Question

Good effect of pollution in cities

Answer 1

There is no any type of good effect of pollution in cities. The pollution has only an bed effect

Answer 2

The smog you see lingering over a city is a good example of visible pollution. Invisible pollutants aren't as noticeable, but they can be just as deadly, if not more so. Examples of invisible pollutants include nitrogen oxides, sulfur dioxide, and carbon monoxide, to name a few.