1.

Why is it said that – ?(a) The ozone layer is a protective shell of the earth.(b) Water is life.(c) Seawater is useful even though it is not potable.

Answer» Why is it said that – ?

(a) The ozone layer is a protective shell of the earth.

(b) Water is life.

(c) Seawater is useful even though it is not potable.


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