Study: 87% of world’s population in 2013 lived in areas exceeding WHO PM2.5 guidelines
Green Car Congress
DECEMBER 6, 2015
Additionally, the study found that the population-weighted mean concentrations of ozone increased globally by 8.9% from 1990–2013 with increases in most countries—except for modest decreases in North America, parts of Europe, and several countries in Southeast Asia. and ozone (O 3 ). and ozone (O 3 ).
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