1)which gas is present in the greatest amount in our atmosphere?
2)What would happen if our planet had pure oxygen to breath?
3)How do human & animals get the nitrogen they need to build proteins?
4)What is air?
1) O2 Oxygen
2) It is not practically possible
3) from the food human and animal eat they get the nitrogen
4) air is combination of gases.
I have answer all the question.Thanks
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