Sustainability & Environment (Agri-Food Systems) · Sustainability Assessment, Carbon & Governance · also Environmental Legislation, Environmental Governance, Environmental Policy and Planning
The rules: principles of environmental law, the major multilateral agreements and how national laws implement them. India's Acts are examined in GATE ES and UGC NET; the manual uses them as the worked example and states where other countries differ. Trade and agricultural policy are in the Agribusiness track.
In the exams: GATE ES Section 9 (Water and Air Acts, EPA 1986, NGT Act, international treaties); ICAR AICE subject 71 Units 2–3; UGC NET Unit 8; UPSC CSE (heavily asked)
Environmental law and policy are the rules and choices through which societies decide how much pollution, resource use and ecological change they will accept, who pays for protection, and who has a say. They range from global treaties on climate, ozone, biodiversity and chemicals, through national framework acts on water, air, forests and wildlife, to permits for individual factories and farms, court judgments and policies that set goals and allocate money. For anyone working in agriculture and the environment, these rules define what is lawful, what must be assessed and reported, and what is likely to be required next.
This subject covers the principles of environmental law; policy instruments; the climate regime (UNFCCC, Kyoto Protocol and Paris Agreement); the Montreal Protocol; the Convention on Biological Diversity and its protocols; the UNCCD, Ramsar, CITES and CMS; the Basel, Rotterdam and Stockholm chemicals and waste conventions; national framework laws on water, air and environmental protection; forest, wildlife and biodiversity laws; environmental courts and tribunals; national environmental policies; and public participation, access to information and environmental justice. National law is taught through its common structure, with brief, equal comparisons from the European Union, the United States, China, India, Brazil, South Africa, Kenya, Australia and others. Environmental impact assessment is in environmental-impact-assessment, management systems in environmental-management-systems, corporate disclosure and green claims in sustainability-reporting-esg, supply chain due diligence in sustainable-supply-chains, and trade and agricultural policy in the Agribusiness track.
Laws change frequently — many countries amended their forest, biodiversity, wildlife and pollution laws between 2022 and 2024, and climate and chemicals treaties evolve at each meeting of the parties — so dates and provisions are given as they stood when this manual was written, and readers should confirm the current text before relying on them.
Environmental law rests on a small set of principles that appear in treaties, constitutions, statutes and judgments. Sustainable development was defined by the World Commission on Environment and Development (the Brundtland Commission) in 1987 as development that meets the needs of the present without compromising the ability of future generations to meet their own needs. It implies intergenerational equity (fairness to future generations), intragenerational equity (fairness among people living now), integration of environment into economic decisions, and sustainable use of natural resources. The 1972 Stockholm Declaration launched modern international environmental law, and the 1992 Rio Declaration on Environment and Development set out 27 principles that remain the reference: Principle 2 restates the sovereign right of states to exploit their resources together with the responsibility not to cause damage to other states (first articulated in the Trail Smelter arbitration between the United States and Canada, 1938–41, and in Stockholm Principle 21); Principle 7 sets out common but differentiated responsibilities (CBDR), recognising developed countries' greater historical contribution and capacity; Principle 10 covers public participation and access to information and justice; and Principle 17 calls for environmental impact assessment (see environmental-impact-assessment).
The prevention principle requires action to prevent environmental harm before it occurs, rather than repairing it afterwards, and underlies permitting, standards and EIA. The precautionary principle addresses uncertainty: Rio Principle 15 states that where there are threats of serious or irreversible damage, lack of full scientific certainty shall not be used as a reason for postponing cost-effective measures to prevent environmental degradation. Strong versions shift the burden of proof to those proposing a potentially harmful activity; weaker versions merely permit action under uncertainty. The EU treaties make it a basis of environmental policy, and it underlies decisions on genetically modified organisms, pesticides and chemicals. The polluter pays principle, adopted by the OECD in 1972 and restated as Rio Principle 16, holds that the costs of pollution prevention, control and damage should be borne by the polluter rather than by society; it is implemented through charges, taxes, liability, permit fees and extended producer responsibility (see circular-economy-bioresources). Related principles include the user pays principle, the principle of public participation and the principle of non-regression (environmental protection, once achieved, should not be reduced).
Principles become binding law when legislatures write them into statutes or when courts read them into constitutions and earlier law, and comparative environmental law is largely a story of courts in different regions borrowing from one another. More than 100 constitutions now contain a right to a healthy environment or a state duty to protect it, and courts in countries without such a clause have read the right into the right to life — the Supreme Court of India and the courts of Pakistan, Bangladesh, Colombia and Nigeria have all done so. In Minors Oposa v. Factoran (1993) the Supreme Court of the Philippines accepted that children could sue on behalf of future generations to stop excessive logging licences, the classic statement of intergenerational equity in a court. Liability rules have tightened: the English rule of strict liability (Rylands v. Fletcher, 1868) allows defences such as act of God, whereas the rule of absolute liability for hazardous enterprises, laid down after a 1985 oleum gas leak in India, allows none; US Superfund liability for contaminated sites is strict, joint and several. Courts in South Asia, Latin America and Africa have held that the precautionary and polluter pays principles are part of national law even where no statute says so, ordering polluting industries to pay for remediation. The public trust doctrine, under which the state holds rivers, shores and forests in trust for the public, began in US water law (Illinois Central Railroad v. Illinois, 1892; the Mono Lake case, 1983) and has been adopted in Kenya, South Asia and parts of Africa. Colombia's Constitutional Court recognised the Atrato River as a subject of rights (2016), and in 2024 the European Court of Human Rights (KlimaSeniorinnen v. Switzerland) and courts in South Asia recognised rights against the adverse effects of climate change.
Governments use four broad families of instruments. Regulation, often called command and control, sets mandatory requirements enforced by sanctions. Standards take several forms: ambient quality standards set limits for the receiving environment (for example national ambient air quality standards for particulate matter); emission or effluent standards limit what a source may discharge; technology standards require specific equipment or best available techniques (as in the EU Industrial Emissions Directive); product standards limit the content or performance of products (fuel sulphur limits, energy efficiency standards); and bans prohibit substances or activities (leaded petrol, certain pesticides, single-use plastic items). Permits or consents translate standards into site-specific conditions. Regulation is predictable and effective for serious hazards but can be costly, because it does not equalise the marginal cost of abatement across polluters, and gives no incentive to do better than the standard.
Economic or market-based instruments change prices to align private incentives with environmental goals. A Pigouvian tax sets a charge per unit of pollution equal to the marginal external damage at the efficient level, so that polluters reduce emissions until their marginal abatement cost equals the tax. Charges and fees for effluent, waste disposal and water abstraction work similarly. Tradable permit (cap-and-trade) systems set a cap on total emissions, distribute allowances and let polluters trade; the allowance price emerges from the market, and abatement is undertaken where it is cheapest. The US Acid Rain Program (1990) for sulphur dioxide, the EU Emissions Trading System (2005) for greenhouse gases, China's national carbon market (2021), the Regional Greenhouse Gas Initiative in the north-eastern United States (2009) and particulate emissions trading pilots in South Asia are examples. A worked example shows why trading saves cost: two firms must together abate 100 t; firm A's marginal abatement cost is 2q and firm B's is 6q. Uniform abatement of 50 t each costs 10000 in total; with trading, abatement shifts until marginal costs are equal — A abates 75 t and B 25 t at an allowance price of 150 — and total cost falls to 7500, a saving of 2500. Other economic instruments are deposit-refund systems, subsidies for clean technology, removal of environmentally harmful subsidies, and liability rules. The Coase theorem suggests that, with clear property rights and low transaction costs, private bargaining could reach efficient outcomes, but transaction costs are usually high for diffuse pollution.
Information instruments require or encourage disclosure so that markets, communities and civil society can respond: pollutant release and transfer registers (the US Toxics Release Inventory, created in 1986, is the classic example), product labels and ecolabels, energy performance certificates, corporate sustainability reporting (see sustainability-reporting-esg) and public ratings of polluters. Voluntary approaches include negotiated agreements between government and industry, unilateral corporate commitments, and voluntary programmes and certification (see environmental-management-systems). They can be flexible and fast, but evidence on their environmental effect is mixed, especially without a credible threat of regulation. In practice, policy mixes combine instruments: a fertiliser policy might set nitrate limits in vulnerable zones (regulation), tax or remove subsidies on excess nitrogen (economic), require nutrient management plans and soil testing (information) and support voluntary farm schemes. Choosing instruments involves environmental effectiveness, cost-effectiveness, distributional effects, administrative feasibility, political acceptability and the nature of the problem — bans for highly toxic substances, prices for many diffuse sources, information where awareness is the barrier.
The UNFCCC was adopted in 1992, opened for signature at the Rio Earth Summit and entered into force in 1994; it has near-universal membership. Its ultimate objective (Article 2) is the stabilisation of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system, within a time frame allowing ecosystems to adapt naturally, food production not to be threatened and economic development to proceed sustainably. It applies the principle of common but differentiated responsibilities and respective capabilities, divides parties into Annex I (industrialised countries and economies in transition), Annex II (the wealthier Annex I countries with finance obligations) and non-Annex I (mostly developing countries), and requires all parties to report national inventories and measures. The Conference of the Parties (COP) meets annually; COP decisions have created the subsequent agreements and institutions.
The Kyoto Protocol (1997, in force 2005) set legally binding emission targets for developed countries listed in Annex B, averaging about 5 % below 1990 levels in the first commitment period, 2008–2012, covering six greenhouse gases (carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons and sulphur hexafluoride; nitrogen trifluoride was added later). Developing countries had no binding targets. It created three flexibility mechanisms: international emissions trading among Annex B parties, joint implementation (projects in other Annex B countries) and the Clean Development Mechanism (CDM), under which projects in developing countries generated certified emission reductions that developed countries could use towards their targets (see carbon-markets-offsets). The United States signed but never ratified the Protocol, and Canada withdrew in 2011. The Doha Amendment (2012) set a second commitment period, 2013–2020, which entered into force only at the end of 2020. Kyoto's top-down model, with targets for only some countries, was widely seen as unable to cover growing emissions from emerging economies.
The Paris Agreement, adopted at COP21 in December 2015 and in force from November 2016, replaced the top-down approach with nationally determined contributions (NDCs) from all parties. Article 2 aims to hold the global average temperature increase well below 2 °C above pre-industrial levels and pursue efforts to limit it to 1.5 °C, to increase adaptive capacity and to make finance flows consistent with low-emission, climate-resilient development; Article 4 calls for global peaking of emissions as soon as possible and a balance between emissions and removals in the second half of the century. Each party must prepare, communicate and maintain successive NDCs every five years, each representing a progression ('ratchet'); a global stocktake every five years, the first concluded at COP28 in 2023, assesses collective progress; and the enhanced transparency framework (Article 13) requires biennial transparency reports, the first due by the end of 2024. Article 6 allows cooperative approaches, including transfers of mitigation outcomes between countries (Article 6.2) and a UN-supervised crediting mechanism (Article 6.4), with rules finalised at COP29 (2024). Article 7 sets a global goal on adaptation, Article 8 recognises loss and damage (a fund was operationalised at COP28), and Article 9 covers finance: developed countries' goal of mobilising 100 billion US dollars a year by 2020 was replaced at COP29 by a new collective quantified goal of at least 300 billion dollars a year by 2035, within a call to scale finance to 1.3 trillion. NDCs take several forms: absolute economy-wide cuts (the EU's at least 55 % below 1990 by 2030), emissions-intensity targets per unit of GDP (China and India), peaking years, shares of non-fossil power capacity, and conditional targets that depend on finance (common in Africa); net-zero dates range from 2050 for most developed countries to 2060 (China) and 2070 (India). The United States withdrew from the Agreement in 2020, rejoined in 2021 and announced withdrawal again in 2025.
Stratospheric ozone absorbs harmful ultraviolet-B radiation. In the 1970s scientists showed that chlorofluorocarbons (CFCs), used as refrigerants, aerosol propellants, foam-blowing agents and solvents, could release chlorine that destroys ozone, and in 1985 British Antarctic Survey scientists reported the springtime 'ozone hole' over Antarctica. The Vienna Convention for the Protection of the Ozone Layer (1985) set a framework for cooperation and research, and the Montreal Protocol on Substances that Deplete the Ozone Layer (1987, in force 1989) set binding phase-out schedules for ozone-depleting substances (ODS). Ozone depletion potential (ODP) expresses a substance's effect relative to CFC-11 (ODP = 1): for example halons have ODPs several times higher, methyl bromide about 0.6 and HCFC-22 about 0.055. Consumption limits are calculated in ODP-weighted tonnes, so 100 t of HCFC-22 counts as 5.5 ODP tonnes.
The Protocol has been strengthened by amendments and adjustments: London (1990) added substances and created the Multilateral Fund to pay developing countries' incremental costs of compliance; Copenhagen (1992) brought forward phase-outs and added HCFCs and methyl bromide; Montreal (1997) introduced licensing of trade; Beijing (1999) added bromochloromethane and controls on HCFC production; and the Kigali Amendment (2016, in force 2019) added hydrofluorocarbons (HFCs) — not ozone-depleting but potent greenhouse gases that replaced CFCs and HCFCs — with a phase-down of HFC consumption measured in CO2-equivalent. Developing countries ('Article 5 parties') have later schedules: CFCs were phased out by 1996 in developed countries and by 2010 in developing countries; HCFCs are being phased out by 2030 in developed and largely by 2030 with a small servicing tail to 2040 in developing countries. Under Kigali, most developed countries cut HFCs by 85 % by 2036; most developing countries froze consumption in 2024 and cut by 80 % by 2045; a group including India, Pakistan, Iran, Iraq and the Gulf states freezes in 2028 and cuts by 85 % by 2047.
Agriculture was directly affected through methyl bromide, a soil fumigant used before planting high-value crops such as strawberries, tomatoes and flowers, and for treating stored products. It was phased out by 2005 in developed countries and 2015 in developing countries, with exemptions for critical uses and for quarantine and pre-shipment treatments; alternatives include solarisation, grafting onto resistant rootstocks, substrate culture, biofumigation and other chemicals. The Montreal Protocol is widely regarded as the most successful environmental treaty: it was the first treaty in UN history to achieve universal ratification (in 2009); atmospheric concentrations of ODS are declining; and the ozone layer is projected to recover to 1980 values around mid-century, around 2066 over Antarctica according to the 2022 scientific assessment. Because many ODS are also greenhouse gases, it has avoided substantial warming, and the Kigali Amendment is expected to avoid up to about 0.4 °C of warming by 2100. Reasons for success include clear science, available substitutes, a small number of producers, trade measures against non-parties, differentiated obligations with finance, and flexible adjustment procedures.
The Convention on Biological Diversity (CBD) was opened for signature at the 1992 Rio Earth Summit and entered into force in 1993. It has three objectives: the conservation of biological diversity, the sustainable use of its components, and the fair and equitable sharing of benefits arising from the utilisation of genetic resources. It affirms that states have sovereign rights over their genetic resources, requires national biodiversity strategies and action plans (NBSAPs), in-situ and ex-situ conservation, environmental impact assessment of projects likely to harm biodiversity, and respect for the knowledge, innovations and practices of indigenous and local communities (Article 8(j)). The United States is the most notable non-party. The CBD's Conference of the Parties adopts decisions and targets; the Strategic Plan 2011–2020 contained the 20 Aichi Biodiversity Targets, none of which was fully met globally by 2020.
The Cartagena Protocol on Biosafety (2000, in force 2003) governs transboundary movements of living modified organisms (LMOs) resulting from modern biotechnology that may harm biodiversity, applying a precautionary approach. It establishes an advance informed agreement procedure for LMOs intended for release into the environment, such as seeds, a simpler procedure for LMOs intended for direct use as food, feed or processing, and a Biosafety Clearing-House for information exchange. The Nagoya–Kuala Lumpur Supplementary Protocol on Liability and Redress (2010, in force 2018) addresses damage from LMOs. The Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilization (2010, in force 2014) requires users to obtain prior informed consent from the provider country and agree mutually agreed terms for benefit sharing, and requires user countries to check compliance. The International Treaty on Plant Genetic Resources for Food and Agriculture (FAO, 2001, in force 2004), which is harmonised with the CBD, creates a multilateral system of access and benefit sharing for a list of major food and forage crops, and recognises farmers' rights.
At COP15 in December 2022 the parties adopted the Kunming-Montreal Global Biodiversity Framework, with four long-term goals for 2050 and 23 targets for 2030. Among them: effective conservation of at least 30 % of land and inland waters and of coastal and marine areas (target 3, '30 by 30'); restoration of at least 30 % of degraded ecosystems (target 2); reducing the overall risk from pesticides and highly hazardous chemicals by at least half and halving excess nutrients lost to the environment (target 7); sustainable management of agriculture, aquaculture, fisheries and forestry (target 10); business disclosure of biodiversity risks, dependencies and impacts (target 15, see sustainability-reporting-esg); and identifying and reducing harmful subsidies by at least 500 billion US dollars a year by 2030 (target 18). COP16 (2024) created a fund for benefits from digital sequence information on genetic resources. Parties implement the CBD and Nagoya Protocol through access and benefit-sharing laws, often with a national competent authority, regional boards and local committees that keep community biodiversity registers; such laws in the Andean Community (Decision 391, 1996), South Africa, Brazil, Costa Rica and South Asia regulate access to genetic resources and associated traditional knowledge with prior informed consent and mutually agreed terms.
The UN Convention to Combat Desertification (UNCCD), adopted in 1994 and in force in 1996, addresses land degradation in arid, semi-arid and dry sub-humid areas resulting from climatic variations and human activities. It emphasises bottom-up national action programmes, participation of local communities, and regional implementation annexes, with a particular focus on Africa. Its parties adopted the target of land degradation neutrality (LDN), which is also SDG target 15.3 — a state in which the amount and quality of land resources necessary to support ecosystem functions and food security remain stable or increase. Countries have pledged around a billion hectares for restoration in total (see land-degradation-soil-conservation). The Ramsar Convention on Wetlands of International Importance, adopted in Ramsar, Iran, in 1971 and in force in 1975, is the oldest of the modern global environmental treaties. Parties designate wetlands of international importance (Ramsar sites), commit to the 'wise use' of all wetlands, and cooperate on shared wetlands; the Montreux Record lists Ramsar sites where changes in ecological character have occurred or are likely. The United Kingdom and Mexico have designated the most sites, while Bolivia and Canada hold the largest designated areas.
The Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), signed in Washington in 1973 and in force in 1975, regulates international trade in specimens of listed species through a system of permits issued by national management authorities on the advice of scientific authorities. Appendix I includes species threatened with extinction, in which commercial international trade is generally prohibited; Appendix II includes species not necessarily threatened now but that may become so unless trade is controlled, for which export permits require a finding that trade will not be detrimental to the species' survival; and Appendix III includes species listed by a party that needs other countries' cooperation to control trade. CITES matters for agriculture and forestry through listings of timber species, medicinal plants and wildlife products, and its effectiveness depends on national enforcement against illegal trade.
The Convention on the Conservation of Migratory Species of Wild Animals (CMS, or Bonn Convention), signed in 1979 and in force in 1983, protects animals that migrate across national boundaries. Appendix I lists migratory species threatened with extinction, for which range states must strive to protect them strictly and conserve their habitats; Appendix II lists species with an unfavourable conservation status that would benefit from international cooperation, for which range states conclude agreements and memoranda of understanding (for example on African-Eurasian waterbirds or raptors). Its COP14 met in Samarkand, Uzbekistan, in 2024. Other biodiversity-related conventions include the World Heritage Convention (1972), which protects sites of outstanding universal value including natural sites, and the International Plant Protection Convention, which sets phytosanitary standards relevant to agricultural trade. The biodiversity-related conventions cooperate through liaison groups to reduce duplication, but implementation depends on national law (chapter 9).
The Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal was adopted in 1989 and entered into force in 1992, after scandals in which toxic wastes from industrialised countries were dumped in developing countries. It requires prior informed consent of importing and transit states before hazardous wastes are exported, environmentally sound management of wastes, minimisation of generation and of transboundary movements, and treats illegal traffic as criminal. The Ban Amendment (1995), which entered into force in 2019, prohibits exports of hazardous wastes from OECD and EU countries and Liechtenstein to other countries. Amendments adopted in 2019 and effective from 2021 brought most plastic waste under the prior informed consent procedure, unless it is clean, sorted and destined for recycling, responding to large flows of mixed plastic waste to Asian countries.
The Rotterdam Convention on the Prior Informed Consent Procedure for Certain Hazardous Chemicals and Pesticides in International Trade (1998, in force 2004) gives importing countries the power to decide which of the chemicals listed in its Annex III they will accept, and requires exporting countries to respect these decisions and to provide information on banned or severely restricted chemicals. Annex III includes many pesticides and severely hazardous pesticide formulations as well as industrial chemicals. The convention does not ban chemicals but promotes shared responsibility and information exchange, which matters for agriculture in countries with limited capacity to evaluate pesticides.
The Stockholm Convention on Persistent Organic Pollutants (2001, in force 2004) targets chemicals that are persistent, bioaccumulative, toxic and capable of long-range transport. The initial twelve POPs, the 'dirty dozen', included nine pesticides (aldrin, chlordane, DDT, dieldrin, endrin, heptachlor, hexachlorobenzene, mirex and toxaphene), the industrial chemicals polychlorinated biphenyls (PCBs), and the unintentionally produced dioxins and furans. Annex A lists chemicals for elimination, Annex B chemicals for restriction (DDT is allowed for disease vector control under conditions), and Annex C unintentionally produced POPs whose releases must be reduced. Many chemicals have been added since, including lindane and endosulfan, both formerly widely used insecticides, and per- and polyfluoroalkyl substances such as PFOS and PFOA. The Basel, Rotterdam and Stockholm conventions share a joint secretariat and hold coordinated meetings. The Minamata Convention on Mercury (2013, in force 2017) controls mercury mining, products, artisanal gold mining and emissions. Negotiations for a global treaty on plastic pollution began in 2022 but had not concluded by 2025. National implementation includes hazardous-waste rules that control import, export and handling, pesticide registration laws and bans on specific pesticides.
Most national pollution laws share one structure, largely set after the 1972 Stockholm conference. A framework act declares objectives and creates a regulator — a national environmental protection agency, often with regional or provincial boards. Ambient standards fix the quality the receiving air or water must meet, and emission or effluent standards fix what each source may discharge. A permit (also called a consent, licence or authorisation) is required before a polluting plant is built and again before it operates, and it carries conditions on discharge, monitoring and reporting; the EU's integrated permits under the Industrial Emissions Directive cover air, water, waste and noise in one document, whereas many other systems still issue separate permits for each medium. An umbrella law then gives the government wide power to make rules — on environmental impact assessment, hazardous waste, municipal solid waste, plastics, e-waste, health-care waste, coastal zones and noise — and to order closure or cut off electricity or water to a defaulting plant. Enforcement combines inspection, self-monitoring by the operator, continuous emissions monitoring for large sources, administrative penalties, criminal prosecution for serious offences and civil liability for damage. A recent trend in several countries is decriminalisation of minor offences, replacing imprisonment with monetary penalties set by an adjudicating officer, so that enforcement is faster; critics argue it weakens deterrence. Many framework laws were triggered by disasters: the Bhopal gas leak of 1984, Minamata mercury poisoning in Japan, the Love Canal waste site in the United States and the Seveso dioxin release in Italy (which gave the EU its Seveso Directive on major-accident hazards).
Regulators are typically organised in two or three tiers: a ministry of environment that makes policy and rules; a national agency that sets standards, runs monitoring networks for air and water quality and coordinates; and regional or provincial bodies that issue permits, inspect and enforce. Several countries require operators that handle hazardous substances to carry public liability insurance or financial guarantees so that accident victims receive immediate relief, and the EU Environmental Liability Directive (2004) makes operators pay to prevent and remedy damage to water, land and protected species. Agriculture is only partly regulated: crop residue burning is restricted under air pollution law in many parts of Asia, Latin America and Africa; pesticide registration follows the FAO/WHO International Code of Conduct on Pesticide Management; nitrate pollution from farms is controlled by rules such as the EU Nitrates Directive; and large livestock operations, sugar mills, distilleries and food processing units need permits and, for some, environmental impact assessment.
Countries structure their laws differently. The United States has media-specific federal statutes implemented by the Environmental Protection Agency (created in 1970) and the states: the Clean Air Act (1970, with major amendments in 1977 and 1990); the Clean Water Act (1972) with National Pollutant Discharge Elimination System permits; the Resource Conservation and Recovery Act (1976) for waste; the Comprehensive Environmental Response, Compensation and Liability Act (1980, 'Superfund') for contaminated sites; the Federal Insecticide, Fungicide and Rodenticide Act for pesticides; and the Endangered Species Act (1973). The European Union legislates through directives (binding as to results, transposed into national law) and regulations (directly applicable): the Water Framework Directive (2000), the Nitrates Directive (1991), the Industrial Emissions Directive (2010), the REACH regulation on chemicals (2006), the Birds and Habitats Directives with Natura 2000, the European Climate Law (2021) setting climate neutrality by 2050 and a 55 % net cut by 2030 against 1990, and the Nature Restoration Regulation (2024). China revised its Environmental Protection Law in 2014, effective 2015, introducing daily accumulating fines and public interest litigation. India's Water Act (1974), Air Act (1981) and umbrella Environment (Protection) Act (1986) follow the board-and-consent model. Brazil's Forest Code (2012) requires legal reserves and permanent preservation areas on rural properties. South Africa's Constitution (section 24) and National Environmental Management Act (1998), and Kenya's Constitution (2010) with its Environmental Management and Co-ordination Act, provide rights-based frameworks. Australia's Environment Protection and Biodiversity Conservation Act (1999) concentrates federal law on matters of national environmental significance.
Forest law in much of Asia and Africa has colonial roots: nineteenth- and early twentieth-century forest acts classified land as reserved, protected or village forest, asserted state ownership and regulated the use and transit of forest produce, often at the expense of customary rights. Modern forest laws add three tools. First, conversion control: diverting forest land to non-forest use requires prior approval, compensatory afforestation and often a payment for the value of lost ecosystem services, as in South Asia, or a legal reserve on each rural property, as under Brazil's Forest Code (80 % in the Amazon biome). Second, sustainable forest management: concession and harvesting rules, management plans and, increasingly, chain-of-custody and legality rules such as the US Lacey Act amendment (2008), the EU Timber Regulation (2013) and the EU Deforestation Regulation (2023), which require importers to show that commodities such as soy, cattle, palm oil, cocoa, coffee, rubber and wood are deforestation-free. Third, definition: what counts as 'forest' decides what is protected, and courts in several countries have read the term broadly, regardless of ownership. National forest policies commonly set a target share of land under forest or tree cover, and the UN Strategic Plan for Forests 2017–2030 seeks a 3 % increase in global forest area by 2030.
About a quarter of the world's land is owned, managed or used by Indigenous peoples and local communities (IPBES), and a growing number of laws recognise their tenure: community forest concessions in Guatemala's Petén, community forestry in Nepal and Mexico, Indigenous territories in Brazil and Colombia, and laws in South Asia recognising individual and community forest rights with decision-making roles for village assemblies. The principle of free, prior and informed consent (FPIC), set out in the UN Declaration on the Rights of Indigenous Peoples (2007) and ILO Convention 169 (1989), has been applied by courts and commissions, for example the Inter-American Court in Saramaka People v. Suriname (2007), and by village assemblies that have rejected mining projects on their sacred lands. Wildlife laws, which also implement CITES, list species in schedules or categories of protection, prohibit hunting of listed species, regulate trade and create protected areas — national parks, sanctuaries or reserves, community reserves — whose categories are standardised by IUCN (see landscape-ecology-protected-areas). Buffer or eco-sensitive zones around protected areas restrict harmful activities, and specialised agencies run flagship programmes for species such as tigers, rhinos and elephants.
National biodiversity laws implement the CBD and Nagoya Protocol (chapter 5), usually by making access to genetic resources subject to prior approval by a national biodiversity authority and to benefit-sharing agreements, often with local biodiversity committees that document community knowledge; Costa Rica's Biodiversity Law (1998), India's Biological Diversity Act (2002) and South Africa's Biodiversity Act (2004) are examples. Plant variety laws based on UPOV protect breeders' rights, and some, following ITPGRFA Article 9, also recognise farmers' rights to save, use, exchange and sell farm-saved seed (other than branded seed of a protected variety). For species and habitats, the United States' Endangered Species Act 1973 prohibits 'take' of listed species and requires federal agencies to avoid jeopardising them; the EU Habitats Directive (1992) and Birds Directive (1979, codified 2009) establish the Natura 2000 network with assessment of plans and projects likely to affect sites; Brazil's Forest Code (2012) requires landowners in the Amazon to keep up to 80 % of forest properties as legal reserve, with lower percentages elsewhere, and registration in the rural environmental registry; Kenya's Forest Conservation and Management Act (2016) and Wildlife Conservation and Management Act (2013) combine conservation with community participation. A recurring tension in all these systems is between strict protection of nature and the rights and livelihoods of communities living in and around forests, which modern laws try to resolve through community rights, co-management and benefit sharing.
Courts shape environmental law most where standing is broad. Public interest litigation (PIL), developed by the higher courts of South Asia from the late 1970s and since adopted in the Philippines, Kenya, Brazil and elsewhere, lets any person approach a constitutional court on behalf of the public. Courts in several countries have issued continuing mandamus — ongoing supervision through repeated orders — in forest, river and urban air pollution cases, one of which led to the conversion of a capital city's buses and three-wheelers to compressed natural gas around 2000–2002. The Philippines created the writ of kalikasan (2010), a special remedy for environmental damage affecting more than one province. Specialised bodies take two main forms. Environmental courts are part of the judiciary, such as the Land and Environment Court of New South Wales (1980), the Environment Court of New Zealand, Kenya's Environment and Land Court and China's environmental tribunals, many of which hear public interest suits by NGOs and procurators. Green tribunals are statutory bodies with judicial and expert members, such as India's National Green Tribunal (2010) and the tribunals of Chile (2012), which hear cases arising under a schedule of environmental laws, review permits and clearances, order compensation and restitution, follow natural justice rather than the full civil procedure code and aim for fast disposal. UNEP's guide sets out the design choices: jurisdiction, expert members, standing, costs, remedies and enforcement.
Environmental courts and tribunals (ECTs) have spread rapidly: a UNEP survey published in 2016 counted more than a thousand ECTs in over forty countries. The Land and Environment Court of New South Wales in Australia (1980) is often cited as the first superior court specialised in environmental matters; New Zealand's Environment Court, Kenya's Environment and Land Court (established under its 2010 Constitution), the Philippines' green courts with writs of kalikasan, and environmental courts in China (since 2007, now numbering in the thousands of specialised divisions) and Brazil are other models. Advantages include expertise, consistency, speed, access for the public and capacity for innovative remedies; risks include isolation from general courts, capture, under-resourcing and limited jurisdiction. Good design gives ECTs adequate independence, expert members, broad standing, affordable access and power to grant effective remedies.
Litigation has become a major channel of environmental governance. In Urgenda Foundation v. State of the Netherlands, the Dutch Supreme Court (2019) upheld an order that the government reduce emissions by at least 25 % below 1990 levels by 2020, based on its duty of care and human rights obligations. In Leghari v. Federation of Pakistan (2015), the Lahore High Court ordered the government to implement its climate policy. The European Court of Human Rights in 2024 found that Switzerland had violated the right to private and family life by failing to adopt adequate climate measures (the KlimaSeniorinnen case). International tribunals have issued advisory opinions: the International Tribunal for the Law of the Sea (2024) held that greenhouse gas emissions are marine pollution under the Law of the Sea Convention, and the International Court of Justice (2025) advised that states have obligations under climate treaties and general international law, including due diligence to prevent significant harm to the climate system. In 2024 the European Court of Human Rights, in KlimaSeniorinnen v. Switzerland, found that weak climate policy violated the right to private and family life, and courts in South Asia recognised a right against the adverse effects of climate change. Litigation against companies — over emissions, greenwashing (see sustainability-reporting-esg) and supply chain harms — is also growing.
Environmental policy is the set of goals, principles and instruments that governments use to address environmental problems. The policy cycle is a useful simplification: problem identification and agenda setting (often prompted by science, disasters, media and civil society); policy formulation (analysis of options and instruments, chapter 2); decision and adoption (legislation, regulation, budgets); implementation (by agencies, local governments, businesses and citizens); and evaluation and revision. Environmental policy integration means building environmental objectives into sector policies — agriculture, energy, transport, industry, finance — rather than leaving them to environment ministries alone; strategic environmental assessment (see environmental-impact-assessment) is one tool for this. Implementation gaps — between laws on paper and outcomes on the ground — are a recurrent problem everywhere, arising from weak enforcement capacity, conflicting objectives, corruption, lack of data and inadequate finance.
National environmental policy documents follow a recognisable pattern across countries. A national environment policy or strategy sets principles — right to a healthy environment, precaution, polluter pays, equity and mainstreaming environment in all sectors — and is reviewed every decade or so; examples include the EU's Environment Action Programmes (the eighth runs to 2030), China's five-year plans with binding energy and pollution targets, and national environment policies in South and Southeast Asia and Africa. Forest, water and agroforestry policies set sectoral goals such as a share of land under tree cover or a basin-based water allocation rule. Climate policy is now organised around the Paris Agreement: each party submits a nationally determined contribution (NDC) every five years, a long-term low-emission strategy, and often a national adaptation plan; many countries also have a national climate action plan with sectoral missions for solar power, energy efficiency, sustainable habitat, water, mountain ecosystems, forests, sustainable agriculture and knowledge, with sub-national plans. Clean air programmes with city-level targets, lifestyle campaigns that encourage sustainable consumption, and agricultural schemes for soil health testing, organic and natural farming and crop residue management are common across Asia, Africa and Latin America. CBD parties prepare national biodiversity strategies and action plans (NBSAPs), and UNCCD parties set land degradation neutrality targets.
The European Union's environmental policy is set by environment action programmes and, since 2019, by the European Green Deal, which includes the European Climate Law, the circular economy action plan, the biodiversity strategy for 2030 and the Farm to Fork strategy for food systems; proposals to halve pesticide use were withdrawn in 2024 after farmer protests, illustrating the politics of agricultural environmental policy. The United States relies more on statutes and executive action, with major federal funding for clean energy through the Inflation Reduction Act (2022) and frequent reversals between administrations. China's policy uses five-year plans with binding environmental targets, an 'ecological civilisation' framework written into the constitution in 2018, and a pledge to peak carbon emissions before 2030 and reach carbon neutrality before 2060. Many developing countries combine national environment policies and climate strategies with donor-supported programmes. A key lesson across countries is that environmental policy for agriculture works best when it combines regulation of the most harmful practices, payment for ecosystem services and repurposed subsidies, advisory services and support for farmer incomes, rather than relying on any single instrument.
Rio Principle 10 states that environmental issues are best handled with the participation of all concerned citizens, and that each individual shall have appropriate access to environmental information, the opportunity to participate in decision-making processes, and effective access to judicial and administrative proceedings, including redress and remedy. The UNECE Aarhus Convention (1998, in force 2001) turns these three pillars — access to information, public participation and access to justice — into binding obligations for its parties in Europe and Central Asia, with a compliance committee open to communications from the public. The Escazú Agreement (2018, in force 2021) is the first such regional treaty for Latin America and the Caribbean and the first to include specific provisions on protecting environmental human rights defenders. In 2021 the UN Human Rights Council, and in July 2022 the UN General Assembly (resolution 76/300), recognised the human right to a clean, healthy and sustainable environment.
Freedom of information laws now exist in over 130 countries, from Sweden's 1766 press freedom act and the US Freedom of Information Act (1966) to more recent laws in Mexico, South Africa, Kenya and South Asia, and are widely used to obtain permits, inspection reports and clearance documents. Public hearings are part of EIA in most countries (see environmental-impact-assessment), and some laws give village or community assemblies decision-making power over forest resources or projects on Indigenous land. Social movements have repeatedly shaped environmental law: the Chipko movement in the Himalayan foothills from 1973, in which villagers, many of them women, embraced trees to stop commercial felling; Kenya's Green Belt Movement (1977), founded by Wangari Maathai; the rubber tappers of Acre in Brazil led by Chico Mendes, whose campaign produced extractive reserves; the Ogoni campaign against oil pollution in the Niger Delta; and campaigns against large dams in South Asia, the Mekong and the Amazon. These movements framed environmental issues in terms of the livelihoods and rights of the poor — what Martínez-Alier called the 'environmentalism of the poor'.
Environmental justice concerns the fair distribution of environmental benefits and burdens, fair processes for making environmental decisions, and recognition of the identities and knowledge of affected groups. The movement grew in the United States in the 1980s after protests in Warren County, North Carolina (1982) against a toxic waste landfill in a predominantly Black community, and studies showing that hazardous facilities were disproportionately located in minority and low-income areas; the 1991 Principles of Environmental Justice and a 1994 executive order followed. Scholars distinguish distributive justice (who bears pollution, who gets clean air and green space), procedural justice (who participates and is heard) and recognition justice (respect for cultures, knowledge and identities, including indigenous peoples). Climate justice extends these questions globally and between generations: those least responsible for emissions, including small farmers in poor countries, often suffer most from climate impacts. For agriculture, environmental justice issues include pesticide exposure of farm workers and rural communities, water allocation between farmers and industry, land acquisition for projects and conservation, and the distribution of the costs of environmental regulation among small and large farmers.
A student must know the principles and the court cases that made them law, the instrument families with the cap-and-trade cost-saving logic, the key provisions and years of the climate, ozone, biodiversity, wetlands, trade-in-species, migratory species and chemicals treaties, the common structure of national water, air and environment protection acts, forest and wildlife laws and environmental courts and tribunals, and how several countries from different regions compare. Practise questions that match treaties to years and features, explain the difference between Kyoto and Paris, compute ODP-weighted tonnes and trading savings, and analyse a case such as Urgenda, Leghari or Oposa. These areas carry many marks in postgraduate entrance, civil-service and lecturer-eligibility examinations.
A compliance officer, consultant or regulator applies these laws daily: obtaining consents and clearances, interpreting new rules and amendments, advising farms and agro-industries on pesticide, waste and water obligations, responding to cases before environmental courts and tribunals, preparing for inspections, and tracking how international commitments such as the Kigali Amendment, the Paris NDC or the biodiversity framework translate into national rules that affect clients. They must read statutes and notifications precisely and know which authority decides what. Much of their value lies in spotting early which draft rules, court orders or treaty decisions will change obligations, and in keeping records that survive inspection.
A senior official, legal head or policy adviser shapes how laws and policies are designed and implemented: drafting rules, choosing instruments, negotiating in treaty meetings, defending or challenging decisions in courts, and balancing environmental protection with livelihoods and growth. They manage litigation risk and political change, coordinate across ministries and levels of government, and judge when voluntary action is enough and when regulation is needed. They also decide how to engage communities and civil society so that rules are seen as legitimate and are actually followed on farms and in factories.
A professor or principal researcher studies the effectiveness of environmental treaties and national laws, compliance and enforcement, the role of courts and tribunals, policy instrument performance, environmental justice and the political economy of agri-environmental regulation. They contribute to treaty assessments, advise governments and courts, write commentaries on legislation, supervise doctoral research and set examination questions that test understanding of principles and institutions rather than memorised dates. Their empirical work often compares regions or countries before and after a law or judgment to estimate its real effect.
Laws and treaty provisions are summarised, not reproduced, and many were amended recently (forest, wildlife, biodiversity and pollution-law amendments in several countries; EUDR and EU Green Deal revisions; US withdrawal from the Paris Agreement) — the current text must be checked. Penalty amounts, detailed standards (such as ambient air limits) and sub-national laws and rules are not tabulated. The manual does not cover the law of the sea, Antarctic treaty system, nuclear liability, transboundary water law or detailed trade and environment rules (WTO), and gives only brief, illustrative comparisons between countries rather than a full account of any one national system. The number of Ramsar sites and ECTs changes and is not quoted precisely.
Original practice questions written to the syllabus and pattern of the exams named in each question's examTags. They are not past papers and do not reproduce any board's questions. Every numerical answer was computed in a script. Laws and treaty decisions are described as they stood when written; recent amendments should be checked.
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