TOP 9 MOST POLLUTING COUNTRIES

The World Health Organization evaluated the

concentration of PM2.5 particles to determine the most

polluted place on Earth. PM2.5 (fine particulate matter

2.5) refers to tiny particles or droplets in the air that are

two and one-half microns or less in width. These

particles come from car, truck, bus, and off-road vehicle

exhausts and from operations that involve the burning

of fossil fuels such as wood, heating oil, or coal. They

can also originate from indoor sources such as smoking

tobacco, cooking, burning candles or using fireplaces.

PM2.5 is an air pollutant that is a concern for people’s

health when levels in the air are high. These particles

reduce visibility and make the air appear hazy when

levels are elevated. Some cities, such as New York, issue

a PM2.5 Health Advisory when conditions are

considered to be unhealthy for sensitive groups.