ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The burning of fossil fuels
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Adding nitrogen and phosphorus fertilizers to soil to increase crop production
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Deforestation
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Construction of asphalt roads and parking lots
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Using pesticides that potentially kill both harmful and beneficial bacteria
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Detailed explanation-1: -Burning fossil fuels, releasing chemicals into the atmosphere, reducing the amount of forest cover, and the rapid expansion of farming, development, and industrial activities are releasing carbon dioxide into the atmosphere and changing the balance of the climate system.
Detailed explanation-2: -Burning fossil fuels, cutting down forests and farming livestock are increasingly influencing the climate and the earth’s temperature. This adds enormous amounts of greenhouse gases to those naturally occurring in the atmosphere, increasing the greenhouse effect and global warming.
Detailed explanation-3: -The use of fossil fuels is the primary source of CO2 emissions, but the removal of trees from forested land has also contributed. Mature forests, having absorbed CO2 from the atmosphere while growing, store carbon in wood, leaves, and soil. That carbon is released when people clear forested land and destroy the wood.
Detailed explanation-4: -Most CO2 emissions (92%) are from the use of fossil fuels, especially for generation of electricity and heat, transportation, and manufacturing and consumption. Land use, land-use change and forestry is another contributor (3.7%) to human-made CO2 emissions, mostly due to deforestation.