Discussion
The unfavourable alteration of environment due to human activities is termed as :
Answer: D
It is termed pollution.
The standard textbook definition calls pollution 'an unfavourable alteration of our surroundings, wholly or largely as a by-product of man's actions', through changes in energy patterns, radiation levels and the physical and chemical make-up of air, water and land.
Ecological degradation and ecological disturbance are broader terms that also cover natural changes and the loss of ecosystems, and a catastrophe is a sudden disaster, usually natural, rather than the gradual human-made alteration the stem describes.
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