After years of improvement, air pollution in the U.S. is getting worse again
Air pollution worsened in the United States in 2017 and 2018, new data shows, a reversal after years of sustained improvement with significant implications for public health. In 2018 alone, eroding air quality was linked to nearly 10,000 additional deaths in the U.S. relative to the 2016 benchmark, the year in which small-particle pollution reached a two-decade low, according to researchers at Carnegie Mellon University.
The Washington Post reports that "concentrations of the pollutant have risen about 5.5 percent since 2016," and points out several contributing factors that the Carnegie Mellon study identified: increased natural gas use and vehicle traffic, risen severity and frequency of wildfires, and the rollback of regulatory enforcement of the Clean Air Act in recent years.
"The health implications of this increase in [annual average fine particulate matter] PM2.5 between 2016 and 2018 are significant," explains the research paper. "The increase was associated with 9,700 additional premature deaths in 2018. At conventional valuations, these deaths represent damages of $89 billion."
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