Concept explainers
Interpretation : The three pieces of evidence for the occurrence of global warming needs to be explained.
Concept Introduction :
Global warming refers to increase in Earth’s temperature.
The main reason for global warming is increase in the amount of greenhouse gases like carbon dioxide, methane, nitrous oxide etc. in the atmosphere.
The increase of this greenhouse gases in the atmosphere is due to human activities like deforestation, industrialization, excessive use of fossil fuels in auto mobiles, etc.
Explanation of Solution
Over pastfifty years earth’s temperature is increasing tremendously.
Ice in the polar region is melting and causing floods.
Ozone layer depletion in polar regions is due to global warming.
The rate at which the ocean layers evaporate has doubled.
Thus global warming has become a major environmental concern now.
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