Motor vehicles, industrial facilities, and power plants are all major sources of air pollution. They emit a variety of pollutants, including particulate matter, nitrogen oxides, sulfur dioxide, and carbon monoxide.

The Clean Air Act is a law that regulates air pollution in the United States. It was first passed in 1963 and has been amended several times since then. The law sets limits on the amount of air pollution that can be emitted by various sources, such as motor vehicles, industrial facilities, and power plants.

The Clean Water Act is a law that regulates water pollution in the United States. It was first passed in 1972 and has been amended several times since then. The law sets limits on the amount of pollutants that can be discharged into water bodies, such as rivers, lakes, and streams.

The Resource Conservation and Recovery Act is a law that regulates hazardous waste management in the United States. It was first passed in 1976 and has been amended several times since then. The law sets standards for the storage, transportation, and disposal of hazardous waste.

The Comprehensive Environmental Response, Compensation, and Liability Act is a law that regulates land pollution in the United States. It was first passed in 1980 and has been amended several times since then. The law provides for the cleanup of contaminated sites and imposes liability on parties responsible for the contamination.

The Endangered Species Act is a law that protects endangered species in the United States. It was first passed in 1973 and has been amended several times since then. The law prohibits the taking of endangered species and requires federal agencies to protect their habitat.

The National Environmental Policy Act is a law that requires federal agencies to consider the environmental impact of their actions. It was first passed in 1969 and has been amended several times since then. The law requires federal agencies to prepare an environmental impact statement for any major action that could significantly affect the environment.

The Toxic Substances Control Act is a law that regulates the manufacture, distribution, and use of toxic substances in the United States. It was first passed in 1976 and has been amended several times since then. The law requires manufacturers to test new chemicals for safety before they can be sold and gives the government the authority to restrict or ban the use of chemicals that are found to be harmful to human health or the environment.

The Federal Insecticide, Fungicide, and Rodenticide Act is a law that regulates the manufacture, distribution, and use of pesticides in the United States. It was first passed in 1947 and has been amended several times since then. The law requires manufacturers to test pesticides for safety before they can be sold and gives the government the authority to restrict or ban the use of pesticides that are found to be harmful to human health or the environment.

The Safe Drinking Water Act is a law that regulates the quality of drinking water in the United States. It was first passed in 1974 and has been amended several times since then. The law sets standards for the quality of drinking water and requires public water systems to monitor their water quality and report any violations to the government.

The Clean Air Act Amendments of 1990 are a set of amendments to the Clean Air Act that were passed in 1990. The amendments significantly strengthened the Clean Air Act and added new provisions to address acid rain, ozone depletion, and other air pollution problems.

The Kyoto Protocol is an international agreement to reduce greenhouse gas emissions. It was adopted in 1997 and entered into force in 2005. The protocol sets targets for industrialized countries to reduce their greenhouse gas emissions by a certain percentage below 1990 levels.

The Paris Agreement is an international agreement to reduce greenhouse gas emissions. It was adopted in 2015 and entered into force in 2016. The agreement sets a goal of limiting global warming to well below 2 degrees Celsius, preferably to 1.5 degrees Celsius, compared to pre-industrial levels.

The Montreal Protocol is an international agreement to reduce the production and consumption of ozone-depleting substances. It was adopted in 1987 and entered into force in 1989. The protocol has been very successful in reducing the production and consumption of ozone-depleting substances, and the ozone layer is now recovering.