The American Lung Association’s new “State of the Air” report finds that nearly 120 million people in the U.S., or more than one in three, live in counties that had unhealthy levels of ozone or particle pollution.
The American Lung Association’s new “State of the Air” report finds that nearly 120 million people in the U.S., or more than one in three, live in counties that had unhealthy levels of ozone or particle pollution.