Air Pollution in China Drops After Tighter Restrictions Imposed
Average annual population-weighted PM₂.₅ levels for China and the United States, with WHO guidelines recommending that annual PM₂.₅ concentrations not exceed 5 µg/m³.
This chart illustrates the annual air pollution levels in China and the United States. China’s PM₂.₅ concentration levels are significantly higher than those in the United States and exceed WHO guidelines. However, China experienced a notable decrease in pollution levels after 2012, following the implementation of stricter regulations.
