Because in atmospheric layers above the troposphere, there isn't enough oxygen to support the kind of energy consumption that birds require.
Also, because the air isn't thick enough to provide sufficient lift at high altitude.
birds fly in the troposphere which is the lowest layer of the atmosphere.
The ozone appears in the stratosphere and troposphere. Lower stratosphere and higher troposphere contain it.
they both appear to be at the bottom of the earth
Troposphere is the layer closest to earth. All the cloud formation happens in troposphere only.
The two qualities living things of the troposphere is the birds and humans so that living need to survive.
nope there are other layers that make up the atmosphere the troposphere is not the only thing.
15 at the surface and up to negative 55 at the tropopause. Temprature decreases by higher altitude (only in troposphere).
oxygen and nitrogen
The troposphere is the part of the atmosphere where nearly all weather occurs. Tornadoes develop from thunderstorms, which develop from the convection of warm, moist air, which can only be found in the lower troposphere.
The troposphere is the only layer of atmosphere that has rain.
Birds typically fly in the troposphere, which is the layer of Earth's atmosphere closest to the surface. This layer extends up to about 7-17 kilometers above sea level, depending on the region.
It is not only birds that fly. Bats fly and they are not birds.