Air in the U.S. has gotten cleaner for decades, adding years to people's lives and preventing millions of asthma attacks, but nearly half of Americans still live with unhealthy air pollution, a new ...

Exposure to unhealthy levels of air pollution during pregnancy may prolong postpartum depression symptoms in new mothers, according to new research. A team of researchers from the University of ...

Climate change is causing higher levels of particle pollution, the ALA said. Almost half of Americans -- 137 million people -- are experiencing more days of "very unhealthy" and "hazardous" air ...