Q. Consider the following statements regarding “Ozone”:
1.It occurs naturally in the upper layers of the atmosphere.
2.Vehicles and industries are the major source of ground level ozone emissions.
Which of the statements given above is/are correct?

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: C
Notes:

Explanation: It occurs naturally in the upper layers of the atmosphere. This important gas shields the earth from the harmful ultraviolet rays of the sun.

  • However, at the ground level, it is a pollutant with highly toxic effects. Vehicles and industries are the major source of ground level ozone emissions.
  • Ozone makes our eyes itch, burn, and water. It lowers our resistance to cold and pneumonia.

Source: SHANKAR IAS Environment