Tehran's air pollution index reached 172.
Tehran's air pollution, continuing its upward trend, has now reached 172 in the index.
Districts 11 and 19 are the most polluted districts of Tehran respectively.
Tehran's air pollution index reached 172.
Tehran's air pollution, continuing its upward trend, has now reached 172 in the index.
Districts 11 and 19 are the most polluted districts of Tehran respectively.
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