Is there an airy environment for life? If so, how does it differ from the ground one?

There is a ground-air habitat for living organisms. This includes the top layer of the earth, air, and the lower atmosphere. There is no separate ground and air environment. This is due to the fact that very few organisms live in the air and they can sometimes fall on the ground. These are various viruses. They can move freely with gusts of wind. But sometimes they sink to the ground. Birds cannot be classified as airborne, as they spend most of their time on the ground and not in the air. Therefore, it is impossible to separate the air environment.