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These 10 cities have the worst air pollution in the world, and it is up to 15 … – Business Insider


Business Insider
These 10 cities have the worst air pollution in the world, and it is up to 15
Business Insider
The most harmful pollutant to human health is called PM 2.5, short for particle matter that's less than 2.5 microns in diameter. It's found in soot, smoke, and dust and lodges in the lungs causing long-term health problems like asthma and chronic lung

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