New modeling tool enables rapid design of effective and equitable policy combinations.

Study tracks pollution from state to state in the 48 contiguous United States.

New technique enables more efficient and precise estimates of trends in ozone and other atmospheric constituents within selected geographical regions and timeframes.

President Obama is committed to protecting the health of future generations from the impacts of climate change. Today, the Environmental Protection Agency (EPA) is releasing a report quantifying the vast economic, health, and environmental benefits that reducing global carbon pollution will have on the United States, reinforcing the need to act with a sense of urgency.