Consider the following:
1. Soot
2. Chlorofluorocarbons
3. Fly Ash
4. Sulphates and Nitrates
Which among the above is / are main constituents of atmospheric brown cloud?

Answer: [B] Only 1, 3 & 4

Black carbon, fly ash, soil dust particles, and nitrogen dioxide gas, sulphuric compounds are main constituents of atmospheric brown  cloud.

This question is a part of GKToday's Integrated IAS General Studies Module