PM2.5 Pollution in India: A Severe Health Crisis PM2.5 pollution is the greatest external threat to life expectancy in India. GO TO COUNTRY'S PAGE
PM2.5 Pollution in China: Impact on Health and Air Quality While pollution has declined since China started its "war on pollution," PM2.5 levels are still far higher than the WHO guideline. GO TO COUNTRY'S PAGE
PM2.5 Pollution in the U.S.A Growing Concern PM2.5 pollution has declined since policy actions in the 1970's. But wildfire smoke from California and Canada has increased pollution in some parts of the country.