Biology for IGCSE & O level - Human Influences On Ecosystems (Section 5 - No. 21)
What is a key feature of the greenhouse effect?
It cools the Earth by reflecting sunlight back into space.
It warms the Earth by trapping heat in the atmosphere.
It destroys the ozone layer.
It reduces the concentration of greenhouse gases.
Explanation
The greenhouse effect traps heat, which keeps the earth warm.
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