Q. A natural phenomenon that becomes harmful due to pollution is

A
global warming
B
ecological balance
C
greenhouse effect
D
desertification
Solution:

The greenhouse effect refers to the retention of heat in the atmosphere by greenhouse gases, including water vapor, carbon dioxide, methane and nitrous oxide. Due to increasing levels of greenhouse gases in the atmosphere, partially as a result of human industrial activity, progressively more heat is being trapped, resulting in a phenomenon commonly referred to as global warming. Specifically, global warming refers to the rise in average global surface and ocean temperatures.

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