A2. Read the passage and complete the table : (2)
(i) Uses of forests (a) (b) (ii) Effects of deforestation (a) (b)
Answers
Answer
a) Deforestation leads to the destruction of natural habitats of wild animals and leaves them with no place to live and reproduce. This makes animal species endangered and even causes their extinction.
b) As we know that plants absorb carbon dioxide and release oxygen into the atmosphere during photosynthesis. Deforestation has increased the carbon dioxide level of atmosphere with resultant global warming. Green plants constitute the first trophic level of all food chains. They are also responsible for precipitation. Deforestation leads to the disturbed food chain and reduced amount of rainfall.
c) Plant roots hold the soil particles and prevent soil erosion. Deforestation led to soil erosion and wash off of soil in nearby water bodies has caused the flood in many rural areas thereby disturbing the agricultural practices. Likewise, villagers depend on food, wood, fuel, etc. Deforestation has reduced these resources and shelter less wild animals have become a serious threat for nearby villagers.
d) Since, urban population depends on rural population for food, timber and many other resources; deforestation has disturbed this supply chain. The increased natural calamities like the flood as well as global warming have created serious health and other related threats to them.
e) The part of Earth that support life is referred to as biosphere. Adverse effects of deforestation on plants, animals and human have disturbed the proper functioning of the whole biosphere. It includes reduced soil fertility, increased barren land area, global warming, increased intensity and frequency of many natural calamities etc.
f) The extinction of many useful and ornamental plant and animal species has made our future generation deprived of their benefits. Scarce and even diminished nonrenewable resources, global warming, increased earth temperature, pollution level and resultant increased serious health problems are some of the major concerns of future generation caused by deforestation.
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