ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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NO2
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CFCs
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CO2
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H2O
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Detailed explanation-1: -In descending order, the gases that contribute most to the Earth’s greenhouse effect are: water vapour (H2O) carbon dioxide (CO2) nitrous oxide(N2O)
Detailed explanation-2: -The concentration of CO2 has especially increased as a result of the Industrial Revolution and exponential growth in manufacturing activities around the world. Deforestation, agriculture, and fossil fuel use are the primary sources of CO2.
Detailed explanation-3: -Here we see that electricity and heat production are the largest contributor to global emissions. This is followed by transport, manufacturing and construction (largely cement and similar materials), and agriculture.
Detailed explanation-4: -CO2 accounts for about 76 percent of total greenhouse gas emissions. Methane, primarily from agriculture, contributes 16 percent of greenhouse gas emissions and nitrous oxide, mostly from industry and agriculture, contributes 6 percent to global emissions.