1. Which of the following phenomenon is considered responsible for Global Warming? A.Greenhouse effect B.Fire in coal mines C.Dry farming D.Monsoon E.Trade winds
Answer: Option A Solution: Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect, a warming of Earth's surface and lower atmosphere caused by the presence of water vapour, carbon dioxide, methane, nitrous oxides, and other greenhouse gases.
