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National Ambient Air Quality Standards (NAAQS) for lead (Pb) pollution, specify a maximum amount of lead to be present in outdoor air.
EPA’s national ambient air quality standards for SO2 are designed to protect against exposure to the entire group of sulfur oxides (SOx).
National Ambient Air Quality Standards (NAAQS) for SO2 specify maximum amounts of sulfur dioxide to be present in outdoor air.
Nitrogen Dioxide (NO2) primarily gets in the air from the burning of fuel. NO2 forms from emissions from cars, trucks and buses, power plants, and off-road equipment.
National Ambient Air Quality Standards (NAAQS) for NO2 specify maximum amounts of NO2 to be present in outdoor air.
Learn about pollutants from vehicles and engines that cause harmful health effects and climate change.
Find information about wise driving, choosing fuel efficient vehicles, and other tips for decreasing your carbon footprint.