The Kyoto Protocol, adopted in 1992, is an international treaty that aims to reduce greenhouse gas emissions to combat climate change.

The Clean Air Act, enacted in 1970, aims to reduce air pollution and protect public health by regulating emissions from various sources, including vehicles, industries, and power plants.

Sustainable development refers to the process of integrating environmental considerations into economic and policy-making decisions to ensure that economic growth does not compromise the environment and natural resources for future generations.

The Montreal Protocol, adopted in 1987, is an international treaty that aims to protect the ozone layer by phasing out the production and consumption of ozone-depleting substances, such as chlorofluorocarbons (CFCs).

The Endangered Species Act, enacted in 1973, aims to protect threatened and endangered species and their habitats by prohibiting activities that may jeopardize their survival.

The European Union's Emissions Trading System (ETS), established in 2005, aims to reduce greenhouse gas emissions from industries and power plants by setting a cap on emissions and allowing companies to trade emission allowances.

The Paris Agreement, adopted in 2015, aims to limit global warming to well below 2 degrees Celsius, preferably to 1.5 degrees Celsius, compared to pre-industrial levels, by reducing greenhouse gas emissions.

The Clean Water Act, enacted in 1972, aims to reduce water pollution and protect water quality by regulating discharges of pollutants into waterways and setting water quality standards.

The Convention on Biological Diversity, adopted in 1992, aims to promote the conservation and sustainable use of biodiversity, as well as the fair and equitable sharing of benefits arising from the use of genetic resources.

The United Nations Framework Convention on Climate Change (UNFCCC), adopted in 1992, aims to stabilize greenhouse gas concentrations in the atmosphere at a level that prevents dangerous climate change.

The Convention on Long-Range Transboundary Air Pollution, adopted in 1989, aims to reduce transboundary air pollution, including acid rain, by setting limits on emissions of sulfur dioxide and nitrogen oxides.

The Resource Conservation and Recovery Act (RCRA), enacted in 1976, aims to manage hazardous waste and promote recycling by setting standards for the treatment, storage, and disposal of hazardous waste.

The United Nations Convention to Combat Desertification, adopted in 1994, aims to combat desertification and mitigate the effects of drought in arid, semi-arid, and dry sub-humid areas.

The European Union's Water Framework Directive, adopted in 2000, aims to protect and restore water quality and ecosystems by setting environmental objectives and requiring member states to take measures to achieve these objectives.

The Convention on the Conservation of Migratory Species of Wild Animals, adopted in 1979, aims to protect migratory species and their habitats by promoting international cooperation and requiring member states to take measures to protect these species.