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Particulate Matter (PM) Pollution

Health and Environmental Effects of Particulate Matter (PM). The size of particles is directly linked to their potential for causing health problems. Small particles less than 10 micrometers in diameter pose the greatest problems, because…

Epa moves forward with phase down of climate-damaging hydrofluorocarbons

The U.S. Environmental Protection Agency (EPA) is proposing its first rule under the American Innovation and Manufacturing (AIM) Act of 2020 to phase down the production and consumption of hydrofluorocarbons (HFCs), highly potent greenhouse gases…

MethaneEmissions: A Primer

Methane: The ChemicalMethaneis the world’s simplest hydrocarbon,with achemical formula CH4(one atom of carbon and four atoms of hydrogen). It is gaseous under normal atmospheric conditions and iscommonly produced through the decomposition of organic materials in…

EarthJustice: The Fight for Clean Air

The Clean Air Act gives us all the legal right to breathe clean, healthy air. We demand clean air now.

Air Pollution: Everything You Need to Know

How smog, soot, greenhouse gases, and other top air pollutants are affecting the planet—and your health.

Technical Air Pollution Resources

This website provides access to a collection of EPA resources with technical information about many areas of air pollution prevention, technology, regulation, measurement, and science.