Question

Why can't we survive without air?​

Answer 1

Answer:

Because air is mixture of oxygen which is used by the organizams

Answer 2

Human life can exist only in the presence of appropriately composed gaseous air: on the one hand, because life is a combustion phenomenon and, therefore, requires for its maintenance a permanent supply of oxygen, which the human organism, however, can only obtain from gaseous air by breathing; and, on the other hand, ...