Home Biology Ecosystem Ecological Succession (NIS) Why are changes in the global carbon cycle i…
Biology Ecosystem Ecological Succession (NIS) Single Correct MCQ
Published on: August 13, 2026

Why are changes in the global carbon cycle important?

A
Less atmospheric carbon means that there are less fossil fuels available.
B
Changes to the global carbon cycle cause changes in the global nitrogen cycle, as we!i.
C
More atmospheric carbon dioxide means that there is less carbon available for the growth of terrestrial plants.
D
Carbon dioxide functions as a greenhouse gas.

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The correct answer is:
D

Changes in the global carbon cycle affect atmospheric CO₂ levels.

Since CO₂ is a greenhouse gas, it influences Earth’s temperature and climate.

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