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.
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PM2.5 Pollution in India: A Severe Health Crisis

High PM2.5 levels in India cause severe health risks, including respiratory diseases and heart problems. Urgent action is needed to tackle pollution and protect public health.
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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.
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