New Report Finds Over br 137 Million Americans, Live With Poor Air Quality.br NPR reports a new study has found br that more than 40 of U.S. citizens br currently live in cities and states br where the air quality is deemed poor.br The study, published by the American Lung Association's annual 'State of the Air' report, .br found that over 137 million Americans are affected, which is more than ever before.br Experts say in addition to transportation br and factory pollution, increased wildfires br have contributed heavily to the amount of unhealthy air found in the United States.br Experts say in addition to transportation br and factory pollution, increased wildfires br have contributed heavily to the amount of unhealthy air found in the United States.br According to NPR, more than 63 million Americans live with unsafe amounts of deadly particulate matter pollution, or particles br made up dust, ash, metals and soot. .br These particles are often the result of gas-powered machinery and industrial br plants, though recently, they've been br coming from wildfires.br As the world experiences the perils of br climate change, wildfires are burning br hotter and lasting longer.br The three years covered br by [the report] ranked among the seven hottest years br on record globally. , American Lung Association's 'State of the Air' report, via NPR.br Spikes in particle pollution br and high ozone days related br to wildfires and extreme br heat are putting millions br more people at risk... , American Lung Association's 'State of the Air' report, via NPR.br ... and adding challenges to br the work that states and cities are doing across the nation br to clean up air pollution. , American Lung Association's 'State of the Air' report, via NPR.br ... and adding challenges to br the work that states and cities are doing across the nation br to clean up air pollution.