Question

Why do traffic policeman wear mask with charcaol lining

Answer 1

: Traffic policemen are continuously exposed to smoke coming out from the vehicles.The smoke and the suspended particles in it if inhaled can cause breathing and lung problems.So traffic policemen wear masks with charcoal lining as charcoal is activated carbon which absorbs the pollutants in the smoke.

Answer 2

because it filters the air passing through it by attracting the pollutants towards it. charcoal is also used in water filtration in 'pure-It filter'.