Question
What is global warming? On what does it depend?
✓
Answer
- Global warming is increased temperature of the earth. During past century, the temperature of the
- Earth has increased by $0.6 ^\circ C,$ most of it during last three decades.
- This is mainly caused by greenhouse effect.
- Global warming depends upon the amount of $CO_2$ and other greenhouse gases present in the atmosphere.
- An increase in $CO_2$ concentration increases earth’s temperature by retaining more heat.
- Carbon dioxide increases temperature by about $50\%, CFCs$ increase it by $20\%$ and methane increases it by $15\%$ whereas other pollutants increase it by $10\%.$
- Atmospheric air pollution, industrialization and greenhouse effect cause global warming.
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|
S. No.
|
Column I
|
|
Column II
|
|
A
|
UUU
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1
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|
B
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AUG
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C
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D
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E
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