The Trump administration is seeking to lift federal protections on the Tongass National Forest in Alaska, paving the way for possible timber harvests and road construction in the largest national forest in the U.S.
The Acid Rain Program (ARP), established under Title IV of the 1990 Clean Air Act (CAA) Amendments requires major emission reductions of sulfur dioxide (SO2) and nitrogen oxides (NOx), the primary precursors of acid rain, from the power sector.
The Plain English Guide to the Clean Air Act provides a brief introduction to the 1990 Clean Air Act.
As part of the United States’ commitment to implementing the Montreal Protocol on Substances that Deplete the Ozone Layer, Congress amended the Clean Air Act to add provisions (under Title VI) for protecting the ozone layer.
National Ambient Air Quality Standards (NAAQS) for ground-level ozone, or ozone pollution, specify a maximum allowed measurement for ozone (O3) to be present in outdoor air.
The Clean Air Act requires EPA to designate areas in the United States after the agency sets a new National Ambient Air Quality Standard (NAAQS) or revises an existing standard
National Ambient Air Quality Standards (NAAQS) for PM pollution specify a maximum amount of PM to be present in outdoor air.
How do we know if an area is not meeting particulate matter (PM) standards?
National Ambient Air Quality Standards (NAAQS) for CO specify maximum amounts of carbon monoxide to be present in outdoor air.
How do we know if an area is not meeting CO standards?
National Ambient Air Quality Standards (NAAQS) for lead (Pb) pollution, specify a maximum amount of lead to be present in outdoor air.
How do we know if an area is not meeting the standards?
