UPSC Previous Year Question | Prelims GS | 2016

In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index? 1. Carbon dioxide 2. Carbon monoxide 3. Nitrogen dioxide 4. Sulfur dioxide 5. Methane Select the correct answer using the code given below.

  1. 1, 2 and 3 only
  2. 2, 3 and 4 only
  3. 1, 4 and 5 only
  4. 1, 2, 3, 4 and 5

Answer

Correct Answer

2, 3 and 4 only

Explanation

India's Air Quality Index considers pollutants such as carbon monoxide, nitrogen dioxide and sulfur dioxide (along with particulate matter, ozone, etc.), while carbon dioxide and methane, as greenhouse gases rather than criteria pollutants, are not standard AQI parameters, making statement combination 2,3,4 correct.

Topics: air quality monitoring, aqi parameters, environment, pollution