What will happen if airliners try to go near troposphere ?

All of these answers are interesting, and technically correct...although the pragmatic and simple answer is: the aircraft will simply reach an altitude beyond which it will no longer climb. read more

The troposphere is the layer of atmosphere closest to the ground. It extends from the ground up to about 25,000 at the poles and 65,000 ft near the equator. There is a boundary layer called the tropopause between the troposphere and the next layer of atmosphere called the stratosphere. read more

The layer near the ground is the Troposphere. The Stratosphere is only the 2nd layer and it reaches up to 31 miles (50 km) only half the distance to space. Near the top of the Stratosphere the air becomes very thin, roughly 1000 times thinner than at sea level. read more

The base of the stratosphere occurs where heating by conduction from above and heating by convection from below (through the troposphere) balance out; hence, the stratosphere begins at lower altitudes near the poles due to the lower ground temperature.The major reason for the temperature increase with altitude is that most of the ozone (O3) is contained in the stratosphere. read more