Assertion Increase of Co2 in the atmosphere has been recorded in the last 100 years Reason Ther...........

World Geography (Easy) World climates

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Assertion: Increase of Co2 in the atmosphere has been recorded in the last 100 years.

Reason: There has been large scale deforestation in many parts of the world.

Both A and R are true and R explains A

Both A are R are true and R does not explain A

A is true and R is false

R is true and A is false

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Explanation:

Both A and R are true and R explains A
The rapid rise in the atmospheric concentrations is due to the fact that C02 has a very long lifespan in the atmosphere, 100 to 300 years. So, even if the emissions were to reduce to zero all of a sudden, it would have no impact on the atmospheric concentrations in the near term. About half of emitted carbon dioxide is absorbed by plants and oceans, leaving the other half to go into the atmosphere. An addition of about 7.5 billion tonnes carbon dioxide to the atmosphere leads to a 1 ppm rise in its atmospheric concentration.
Deforestation can be defined as the large-scale removal of trees from forests (or other lands) for the facilitation of human activities. It is a serious environmental concern since it can result in the loss of biodiversity, damage to natural habitats, disturbances in the water cycle, and soil erosion. Deforestation is also a contributor to climate change and global warming.