Which of the following contribute to green house effect?
A
Methane
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B
Carbondioxide
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C
CFCs
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D
All of the above
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Solution
The correct option is D All of the above (The greenhouse effect is the natural process by which the atmosphere traps some of the Sun's energy, warming the Earth enough to support life. Most mainstream scientists believe a human-driven increase in "greenhouse gases" is increasing the effect artificially. These gases include carbon dioxide, methane, nitrous oxide, water vapour, CFCs, ozone etc. Ozone in the stratosphere acts as a protective layer, but harmful if it is present in the troposphere).