Home Biology Ecosystem All Topic Question For Revision Test Which of the following human activities have…
Biology Ecosystem All Topic Question For Revision Test Single Correct MCQ
Published on: August 21, 2026

Which of the following human activities have significantly increased the rate of release of carbon dioxide into the atmosphere?

A
Smoking and planting tree
B
Burning of fossil and use of CNG
C
Deforestation and use of Sound mufflers
D
Rapid deforestation and massive burning of fossil fuel

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The correct answer is:
D

Burning fossil fuels releases large amounts of CO 2 , and deforestation reduces carbon absorption by plants. Both greatly increase atmospheric carbon dioxide.

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