Lets look at some facts. * The troposphere extends up to 15 km. * Almost 75% of all the mass of atmosphere is present in the troposphere. * 99% of water vapor is in the troposphere. read more
These things will happen if there was no atmosphere on earth: -Earth would be solid hard rock. Water would not exist. So no life creating molecules or biomolecules would be there. Sky would be dark instead of blue. There would be great difference in temperature of day and night. Difference might be of some 100 of degrees. read more