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Deforestation causes__________ to linger in the atmosphere.

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. $CO _2$

  2. $H _2O$

  3. $O _2$

  4. $N _2$

Show answer
Correct Option: A
Explanation:

Deforestation causes carbon dioxide to linger in the atmosphere. As carbon dioxide accrues, it produces a layer in the atmosphere that traps radiation from the sun. The radiation converts to heat which causes global warming, which is better known as the greenhouse effect.

Forests return most of the water that falls as precipitation to the atmosphere by

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Phororespiration

  2. Respiration

  3. Transpiration

  4. All of the above

Show answer
Correct Option: C
Explanation:

Transpiration is the process by which plants loose water through their leaves in the atmosphere.

Which of the following contributes the most towards deforestation?

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Logging

  2. Commercial agriculture

  3. Subsistence farming

  4. None of the above

Show answer
Correct Option: C
Explanation:

Subsistence farming is responsible for $48$% of deforestation; Commercial agriculture is responsible for $32$%; logging is responsible for $14$%, and fuel wood removals make up $5$%.

The results of deforestation is/are:

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. the reduction in water content of the soil

  2. the increase in water content of the soil

  3. drier climate

  4. increases moisure content of air

Show answer
Correct Option: A,C
Explanation:

The water cycle is affected by deforestation.Trees extract groundwater through their roots and release it into the atmosphere. When part of a forest is removed, the trees no longer transpire this water, resulting in a much drier climate.Deforestation reduces the content of water in the soil and groundwater as well as atmospheric moisture. The dry soil leads to lower water intake for the trees to extract.Deforestation reduces soil cohesion, so that erosion,flooding and landslides ensue.

If deforestation is done in large scale, this natural calamity may occur

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  1. Volcanic eruption

  2. Earthquakes

  3. Global warming

  4. Tsunamis

Show answer
Correct Option: C
Explanation:

If deforestation is performed, there will be no trees so, the amount of the greenhouse gasses will increase in the atmosphere. These greenhouse gasses trap heat from the infrared radiation in the atmosphere and increases the atmosphere's temperature i.e, global warming. 

Thus, the correct answer is option C. 

Deforestation does not lead to

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Quick nutrient cycling

  2. Soil erosion

  3. Alteration of local weather conditions

  4. Destruction of natural habitat of wild animals

Show answer
Correct Option: A
Explanation:

Deforestation leads to soil erosion, alteration of local weather conditions, destruction of natural habitat of wild animals, but it does not lead quick nutrient cycling

So, the correct answer is 'Quick nutrient cycling'

The term 'Phytoremediation' refers to the _________________.

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Use of plants for removing pollutants from the environment

  2. Use of plants as remedies to cure diseases

  3. Use of plants for restoration of degraded forests

  4. Use of plants in the retention of soil water

Show answer
Correct Option: A

The easiest way to improved the denuded forests of teak in India in to.

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Apply mycorrhiza

  2. Apply fertilizer

  3. Add bacterial culture

  4. Use green algae

Show answer
Correct Option: A

What is the importance of forest as a resource?

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. It improves water holding capacity of soil.

  2. It provides habitat, food, protection to wild life.

  3. It help in balancing $CO _{2}$ and $O _{2}$ of atmosphere.

  4. All of the above.

Show answer
Correct Option: D
Explanation:
Forests and biodiversity is key to all life forms. The richer the diversity of life, the greater the opportunity for medical discoveries, economic development and adaptive responses to such new challenges as climate change.
Forests are renewable resources which provide
(a) Habitat, food, protection to wildlife.
(b) Help in balancing CO$ _2$ and O$ _2$ of atmosphere.
(c) Improves water holding capacity of soil.
(d) Regulates water cycle.
(e) For human being, they are the source for all essential commodities like, fuel wood, timber pulp and paper etc.
(f) It provides useful products like fruits, resins, gums, essential oils, bidi wrapper etc. 
Therefore, the correct answer is option D.

What is not useful to increase agriculture production?

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  1. Mechanisation of agriculture

  2. Enhanced irrigation facilities

  3. Use of fertilizers

  4. Deforestation

Show answer
Correct Option: D
Explanation:

Deforestation is the excessive cutting down of the trees which adversely affects the environment. It is not useful for increasing the agricultural production as because it creates several major problems like soil erosin, infertility, and droughts.