Question

Why are chimneys are there in the city and what is their harm?​

Answer 1

Answer:

they produce more heat to the city and causes global warming

Answer 2

Many industries and factories in the cities

have chimneys which emits the harmful

and poisonous gases into the air.

Here, the harm is that it causes Air

pollution and could lead to several dangerous diseases like Asthma and Bronchitis. In order to prevent all this from taking place, nowadays filters are being attached in those chimneys which trap harmful and poisonous substances in the air being emitted outside by the chimneys.

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