Schools across Tehran will be closed on Sunday and residents have been warned to stay at home as a thick smog of pollution hangs in the air, officials said on Saturday.
"All educational establishments in the city of Tehran, and some towns in the province, are suspended on Sunday due to air pollution," the city's top education official Esfandiar Chaharband was quoted as saying by the Mehr news agency.
Outdated vehicles and inconsistent enforcement of emissions regulations are the main drivers of pollution in Iranian cities, which officials have blamed for thousands of deaths from respiratory illnesses.
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