Submission + - US air quality is slipping after years of improvement (apnews.com)
The Grim Reefer writes: After decades of improvement, America’s air may not be getting any cleaner.
Over the last two years the nation had more polluted air days than just a few years earlier, federal data shows. While it remains unclear whether this is the beginning of a trend, health experts say it’s troubling to see air quality progress stagnate.
There were 15% more days with unhealthy air in America both last year and the year before than there were on average from 2013 through 2016, the four years when America had its fewest number of those days since at least 1980.
Air quality is affected by a complex mix of factors, both natural and man-made. Federal regulations that limit the emissions of certain chemicals and soot from factories, cars and trucks have helped dramatically improve air quality over recent decades. In any given year, however, air quality can be affected by natural variations. That may be what’s behind the stalled progress, scientists say.
“What you’re seeing is a flattening off of progress as opposed to a major change in the wrong direction,” said former deputy EPA administrator Bob Perciasepe, president of the Center for Climate and Energy Solutions.
Over the last two years the nation had more polluted air days than just a few years earlier, federal data shows. While it remains unclear whether this is the beginning of a trend, health experts say it’s troubling to see air quality progress stagnate.
There were 15% more days with unhealthy air in America both last year and the year before than there were on average from 2013 through 2016, the four years when America had its fewest number of those days since at least 1980.
Air quality is affected by a complex mix of factors, both natural and man-made. Federal regulations that limit the emissions of certain chemicals and soot from factories, cars and trucks have helped dramatically improve air quality over recent decades. In any given year, however, air quality can be affected by natural variations. That may be what’s behind the stalled progress, scientists say.
“What you’re seeing is a flattening off of progress as opposed to a major change in the wrong direction,” said former deputy EPA administrator Bob Perciasepe, president of the Center for Climate and Energy Solutions.