Q. Consider the following statements:

1. All the weather phenomena like rainfall, fog and hailstorm occur in stratosphere.
2. Stratosphere also contains a layer of ozone gas.

Which of the above is / are correct?
Answer: Only 1
Notes: Troposphere is the most important layer of the atmosphere. Its average height is 13 km. The air we breathe exists here. Almost all the weather phenomena like rainfall, fog and hailstorm occur in this layer. Above the troposphere lies the stratosphere. It extends up to a height of 50 km. This layer is almost free from clouds and associated weather phenomenon, making conditions most ideal for flying aeroplanes. One important feature of stratosphere is that it contains a layer of ozone gas.