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[QUOTE="Munyaradzi Mafaro, post: 50402, member: 636"]
Dhaka landed at number 30 on the global list of cities with terrible air quality today. The busy Bangladesh capital city scored 68 points on the air quality index at 9:20 this morning. Health experts called the air moderate with some risk for people who breathe it. The monsoon season helped keep pollution levels from getting worse. Weather patterns during rainy months usually clean up the air compared to winter.

Kampala in Uganda topped the worst air list with 159 points. Kinshasa from Congo came second with 158 points and Dubai grabbed third place with 139 points. These cities all had much dirtier air than Dhaka today. The air quality index helps people understand how clean or dirty their city air really is.

Scientists measure five different types of pollution to create these daily scores. Particle matter, nitrogen dioxide, carbon monoxide, sulfur dioxide and ozone all count toward the final number. When scores hit between 50 and 100 points, sensitive people should limit outdoor exercise. Numbers between 101 and 150 mean unhealthy air for anyone with breathing problems.

Dhaka fights air pollution problems year round but winter months bring the worst conditions. The monsoon rains help wash away some of the dirty particles floating around the city. World health experts say polluted air kills about seven million people every year around the planet from heart disease, lung cancer and breathing infections.
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