Environment

Tehran Records 18th Day of Heavy Pollution

More than two weeks of heavy pollution led Iranian officials to ban all outdoor sport and impose new traffic restrictions on Wednesday as persistent cold weather exacerbated Tehran’s air quality problems.

In the worst concerted period of pollution for three years, primary schools and nurseries were closed and new car exclusion zones imposed in the capital.

Tehran’s air quality index averaged 159 on Wednesday, up two from the previous day, and more than three times the World Health Organization’s maximum advised level of between zero and 50. One area in northeastern Tehran peaked at 238.

The official IRNA news agency reported that it was the 18th straight day of dangerously bad air.

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