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Levels of two major air pollutants have been reduced significantly since lockdowns began in response to the COVID-19 pandemic, but a secondary pollutant—ground-level ozone—has increased in China, according to new research. The week of Chinese New Year holiday is indicated by the red lantern shown inset panels (b) and (h).
In China, people breathe ozone-laden air two to six times more often than people in the United States, Europe, Japan, or SouthKorea, according to a new international study published in Environmental Science & Technology Letters. 2017 for one ozone metric. 2017 are included.
Ozone levels across much of North America and Europe dropped significantly between 2000 and 2014. People living in parts of southern Europe, SouthKorea and southern Japan and China also experienced more than 15 days a year of ozone levels above 70 ppb. Source: University of Leicester. Click to enlarge.
Those markets include Australia; Brazil; Canada; China; the European Union; India; Japan; Mexico; Russia; SouthKorea; and the United States. In Europe, the ozone mortality burden each year would be 10% lower if diesel vehicle nitrogen oxide emissions were in line with certification limits. million tons more than the 8.6
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