EARTH SCIENCE
CLIMATE AND ENVIRONMENTAL CHANGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Setting forest fires to clear forests rapidly for agricultural activities release carbon dioxide due to combustion.
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The loss of forests as a carbon sink i.e. forests absorb carbon dioxide during photosynthesis.
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The loss of oxygen which makes the earth warmer, as forests contribute oxygen to the atmosphere during photosynthesis.
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Carbon oxidation whereby carbon in exposed soil (without vegetation cover) reacts with oxygen to produce carbon dioxide.
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Detailed explanation-1: -Deforestation can result in more carbon dioxide being released into the atmosphere. That is because trees take in carbon dioxide from the air for photosynthesis, and carbon is locked chemically in their wood. When trees are burned, this carbon returns to the atmosphere as carbon dioxide.
Detailed explanation-2: -Forests store large amounts of carbon. Trees and other plants absorb carbon dioxide from the atmosphere as they grow. This is converted into carbon and stored in the plant’s branches, leaves, trunks, roots and in the soil.
Detailed explanation-3: -Forests and trees store carbon . When they are degraded or completely cleared, e.g. by fire – a process referred to as deforestation – this stored carbon has the potential to be released back into the atmosphere as carbon dioxide and contribute to climate change .
Detailed explanation-4: -Plants take in carbon dioxide and give out oxygen in the process of photosynthesis. Depletion of trees increase the amount of carbon dioxide in the atmosphere. This leads to increase in the temperature of the earth’s surface.
Detailed explanation-5: -Trees take in carbon dioxide and traps it into tissues and soil while at the same time releasing oxygen into the atmosphere. The removal of trees significantly reduces the rate of this process, resulting in higher carbon dioxide in the atmosphere and lower natural oxygen levels.