The Convention on Long-range Transboundary Air Pollution (CLRTAP) is a United Nations treaty that aims to reduce air pollution and its transboundary effects in Europe and North America.

The International Covenant on Economic, Social and Cultural Rights (ICESCR) recognizes the right to a healthy environment in Article 12.

The Principle of Prevention is a fundamental principle of international environmental law that requires states to take measures to prevent significant transboundary environmental harm.

Strategic Environmental Assessment (SEA) is a process that evaluates the environmental impacts of policies, plans, and programs before they are adopted.

The Stockholm Convention on Persistent Organic Pollutants (POPs) is an international treaty that aims to eliminate or restrict the production and use of POPs due to their adverse effects on human health and the environment.

Prior Informed Consent (PIC) is a principle of international environmental law that requires states to provide information, notify, and consult with other states before undertaking activities that may have significant transboundary environmental impacts.

The Paris Agreement is an international treaty that aims to limit global warming to well below 2 degrees Celsius, preferably to 1.5 degrees Celsius, compared to pre-industrial levels.

The Polluter Pays Principle (PPP) is a principle of international environmental law that requires polluters to bear the costs of pollution prevention, control, and cleanup.

The Montreal Protocol on Substances that Deplete the Ozone Layer is an international treaty that aims to protect the ozone layer by phasing out the production and consumption of ozone-depleting substances.

The Principle of Intergenerational Equity is a principle of international environmental law that requires states to take measures to ensure that future generations have access to a healthy environment.

The International Convention for the Prevention of Pollution from Ships (MARPOL) is an international treaty that aims to reduce air pollution from ships and improve air quality in coastal areas.

The Principle of Non-Regression is a principle of international environmental law that requires states to maintain or improve the quality of the environment.

The Rotterdam Convention on the Prior Informed Consent Procedure for Certain Hazardous Chemicals and Pesticides in International Trade (PIC Convention) aims to reduce and eliminate the production and use of hazardous chemicals.

Environmental Impact Assessment (EIA) is a process that assesses the environmental impacts of a proposed project or activity.

The Euro 6 Emission Standards are a set of regulations that aim to reduce air pollution from vehicles and improve air quality in urban areas.