Answer:
Smoke and fumes
Explanation:
Smoke and fumes contain carbon monoxide, carbon dioxide and carbon particles. These are produced from industries which burn coal and petroleum fuels and also from motor vehicles exhaust. Carbon dioxide prevents layers of warm air from escaping into the upper atmosphere causing greenhouse effect that leads to global warming. On a global scale, this may bring about melting of the polar ice caps thus raising the level of oceans hence flooding of lowland areas.
