The air quality in the United States is dramatically declining, leaving about 150 million people -- nearly half of America's population -- breathing unhealthy, heavily polluted air, according to the newly released "State of the Air" 2020 report by the American Lung Association.

American Lung Association’s ‘state of the air’ report finds 166 million Americans are living in unhealthy ozone or particle pollution with serious health risks. More than half of the US population lives amid potentially dangerous air pollution, with national efforts to improve air quality at risk of being reversed, a new report has warned.

More than four in 10 Americans - nearly 138.5 million people - live in counties where ozone or particle pollution levels make the air unhealthy to breathe, according to the American Lung Association's "State of the Air 2015" report released.

The American Lung Association’s annual “State of the Air” report finds half of Americans still live in counties where ozone or particle pollutions levels make the air unhealthy to breathe.

The State of the Air 2013 report looks at levels of ozone and particle pollution found in official monitoring sites across the United States in 2009, 2010, and 2011. The report uses the most current quality-assured nationwide data available for these analyses.

he American Lung Association released its annual report on air quality, State of the Air 2011, which includes lists of the nation’s most polluted metropolitan areas.

The American Lung Association’s report "Toxic Air: The Case for Cleaning Up Coal-fired Power Plants" documents the range of hazardous air pollutants emitted from coal-burning power plants and the urgent need to clean them up to protect public health.  The report details the dangerous mix of toxic air pollutants that flow from the stacks of uncontrolled coal burning power pl

The State of the Air 2010 shows that the air quality in many places has improved, but that over 175 million people