WHO issues new, lower Global Air Quality Guidelines for classical pollutants
Green Car Congress
SEPTEMBER 25, 2021
When action is taken on these classical pollutants—particulate matter (PM), ozone (O?), and carbon monoxide (CO)—it also has an impact on other damaging pollutants. They are applicable to both outdoor and indoor environments globally, and cover all settings. nitrogen dioxide (NO?) sulfur dioxide (SO?)
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