Question

addition of substance to the air, water land or soil which have harmful effect on the living organisms​

Answer 1

Addition of substance to the air, water land or soil which have harmful effect on the living organisms is known as pollution.

And the substance or the impurities are known as pollute.

Answer 2

Answer:

All the three have harmful effects.

Explanation:

If the air is polluted automatically the water is also polluted.for example we can take some water in a bowl and keep it in a dirty atmosphere and after sometime we can observe that there is a layer of dust formed on it. Since organisms need soil water and air, it get affected when one is polluted.

Hope this will be helpful for you. If my answer is wrong please do comment so that I can know the correct answer.Thanks.