ZAHEDAN, Oct. 29 (MNA) – The concentration of suspended particles in the air reached 4,580 micrograms per cubic meter, 31 times beyond the permissible limit, in northern cities of Sistan and Baluchistan province, and air pollution has exacerbated in the region. Some 48 people were sent to hospitals and health centers on Sunday due to respiratory problems resulting from dust and sand storm.


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