Question

How are chimneys of factories and houses helpful?

Answer 1

Explanation:

They reduced the amount of coal burnt in houses and encouraged people to use gas instead of coal. They introduced the use of tall chimneys at power stations to try and make the pollutants disappear into the sky.

Answer 2

THEY MAKE THE SMOKE AND SUSPENDED DUST PARTICLES BE RELEASED  AT AN HEIGHT SO THAT NORMAL POPULATION IS NOT AFFECTED BY THE HARMFUL POLLUTANTS. ALSO AT HIGH ALTITUDES BIRDS ARE LESS AND HENCE DEATHS CAUSED BY POLLUTION OF AVES ALSO REDUCES.

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