Consider the following statements related to ozone:
1. Tropospheric ozone is harmful
2. Stratospheric ozone is beneficial
3. During the prevalence of photochemical smog, O${}_3$ is formed
Which of the above statements are correct?

Q60. With respect to the Ozone which of the following statements is/are correct
1. Ozone is one of the primary components of photochemical smog.
2. Tropospheric Ozone rduces ecological productivity.
3. Tropospheric Ozone may cause acid rain.
Which of the above statement(s) is/are correct?

Q1. Consider the following statements:

1. Ozone is a greenhouse gas which is a key component of smog.

2. Ethane and propane escape into the air from leaks during natural gas extraction and distribution.

Which of the above statements are correct?

Q. Consider the following statements:

Which of the above statements is/are correct?

1. 
   1 and 2 only
2. 
   2 only
3. 
   2 and 3 only
4. 
   1 and 3 only