Clean Air Policy

Seven pilot regions in the world's most polluting nation will launch markets to cap-and-trade greenhouse gas emissions

More than 50,000 high-polluting diesel engines have been cleaned up or removed from U.S. roads in a federal program

The Department of Energy and the Environmental Protection Agency are among the federal agencies that will have new leadership

On the brink of a federal review, chemicals found in deodorants, lotions and hair conditioners are showing up in Chicago's air at potentially alarming levels

The American Institute of Architects' winning structures combine environmental sustainability with a focus on public health

Scientist Ralph Keeling wants this generation to remember when atmospheric concentrations of carbon dioxide reached 400 parts per million, because of humans

Keeping natural gas from leaking, as well as separating it from other gases, is a key new area of scientific research

The President's plan for next year would give a boost to infrastructure, manufacturing and education in exchange for land conservation and environmental cleanup efforts

The heavy rains over Buenos Aires were just part of the reason that Buenos Aires flooded

Cooperative agreements hammered out in talks over the next few months may focus on greenhouse gases besides carbon dioxide and improving the energy efficiency of buildings

Reducing certain kinds of air pollution could limit the rise of ocean waters and buy time to address CO2 emissions. David Biello reports

The accumulation of DDT in the Himalayas exceeds levels found in the Arctic