What is the primary cause of global warming? MCQ with Answer and Explanation

Explanation:
The Brahmaputra River is known as the 'Sorrow of Assam' because of the frequent floods it causes in the state.

Explanation:
Ozone is a secondary pollutant, meaning it is not emitted directly but is formed in the atmosphere through chemical reactions between primary pollutants (like nitrogen oxides and volatile organic compounds) in the presence of sunlight.

Explanation:
The Hadley cell is a large-scale atmospheric circulation pattern where air rises at the equator, flows poleward, and sinks at the subtropics.