The Paris Agreement, adopted in 2015, is a landmark international agreement that sets ambitious goals for reducing greenhouse gas emissions and mitigating climate change. It also includes provisions for addressing air pollution and improving air quality.

The Convention on Long-Range Transboundary Air Pollution (CLRTAP) is an international agreement that aims to control and reduce transboundary air pollution, including acid rain and ground-level ozone.

The United Nations Environment Programme (UNEP) is the leading global environmental authority that coordinates efforts to improve air quality and address air pollution issues on a global scale.

The Global Atmosphere Watch (GAW) program is a global network of stations that monitor and assess the state of the global atmosphere, including air quality, greenhouse gases, and other atmospheric constituents.

The Global Sulphur Cap is an international initiative that aims to reduce air pollution from ships by limiting the sulphur content in marine fuels.

The World Health Organization's (WHO) air quality guidelines focus on establishing air quality standards for outdoor air, providing guidance to countries on how to protect public health from the adverse effects of air pollution.

The Montreal Protocol is an international agreement that aims to protect the ozone layer by phasing out the production and consumption of ozone-depleting substances.

The Clean Air Act (CAA) in the United States is a comprehensive law that aims to improve air quality and protect public health by regulating air pollution from various sources.

The World Meteorological Organization (WMO) facilitates the exchange of scientific information and promotes cooperation on air quality management through its Global Atmosphere Watch (GAW) program.

The European Union's (EU) Air Quality Directive aims to improve air quality and protect human health by setting limits on air pollutants and requiring member states to take measures to reduce air pollution.

The New Vehicle Emission Standards are international initiatives that aim to reduce air pollution from vehicles by setting emission limits for new vehicles and promoting the adoption of cleaner vehicle technologies.

The Transboundary Air Pollution Convention (TAP Convention) aims to control and reduce transboundary air pollution, including acid rain and ground-level ozone, by promoting cooperation among countries.

The International Civil Aviation Organization (ICAO) coordinates efforts to reduce air pollution from aircraft emissions by setting standards and promoting the adoption of cleaner aviation technologies.

The World Bank's Clean Air and Climate Change Agenda focuses on improving air quality and mitigating climate change by supporting countries in reducing air pollution and transitioning to cleaner energy sources.

The Clean Air for Cities initiative aims to reduce air pollution and improve air quality in cities around the world by promoting sustainable urban development and implementing air quality management strategies.