Question

how can we free the industrial regions from pollution

Answer 1

We can free the industrial regions from pollution in the following method :

before realising the industrial liquid waste into near by river they should be filtered or purified through many filtering process.

the industrial gas should be purified before realising them in to open air.

Answer 2

We can free the industrial region from pollution in the following ways

(1) Waste water should be purified before releasing in river ,seas etc.

(2)The harmful air should be purified before releasing

into the air

I have simple words,which can be understand by you better