Prolonged exposure to 'very poor' quality air, which signifies PM 10 and PM 2.5 levels between 351 and 420, and 211 to 252 micro gram per cubic metre is very harmful.
Prolonged exposure to 'very poor' quality air, which signifies PM 10 and PM 2.5 levels between 351 and 420, and 211 to 252 micro gram per cubic metre is very harmful.