Air pollution is the increase in the harmful substance in the air like carbon dioxide, carbon mono oxide, etc. it is caused due to,
1) Gaseous emissions from vehicles release carbon-di-oxide and carbon mono oxide in the air which is highly toxic.
2) Smoke coming out from factories and industries also releases more toxic gases into the air making it highly toxic.
3) In villages and other backward areas, still wood and cow dung are burnt as a source of fuel which pollutes the air.
