Same chapter3 marksDifficulty: Medium
Suggest three ways in which air pollution from vehicles can be reduced.
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3 marksDifficulty: Medium
What is the greenhouse effect? Name two greenhouse gases and state one consequence of an enhanced effect.
Original Khojo Papers practice question — not from a past board paper.
Answer
The greenhouse effect is the warming of the earth caused by gases in the atmosphere that let the sun's short-wave radiation through but absorb the long-wave radiation the earth re-emits. Carbon dioxide and methane are two such gases. An enhanced effect raises the global temperature, melts glaciers and polar ice, and raises sea levels.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Without any greenhouse effect the earth would be far too cold for life.
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