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Question

Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil is called?

This question was previously asked in
SSC CGL 2017 (Tier 1) Previous Year Paper (16-Aug-2017) (Shift 1)
The correct answer is

Pollution

Pollution is defined as any undesirable change in the physical, chemical, or biological characteristics of air, water, land, or soil caused by contaminants (pollutants). It is broadly classified as air, water, soil, noise, and thermal pollution.

The greenhouse effect is a natural warming process (only one consequence, not the general definition); solid wastes are a type of pollutant, not the change itself; deforestation is the removal of forest cover, a specific action rather than the umbrella term.

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Important Questions from Ecology and Environment

  1. The Imperial Forest Research Institute was set up in 1906 in:

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