Tag: reducing air pollution

Questions Related to reducing air pollution

Which of the among is a major greenhouse gas implicated in global warming?

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. $\displaystyle { CH } _{ 4 }$

  2. $\displaystyle { CO } _{ 2 }$

  3. $\displaystyle { NH } _{ 3 }$

  4. $\displaystyle { N } _{ 2 }$

  5. $\displaystyle { O } _{ 2 }$

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Correct Option: A
Explanation:

Option A is the correct answer.

Methane absorbs heat from the sun very effectively and warms the atmosphere, and hence it is a major greenhouse gas

Thermal pollution causes a decrease in dissolved oxygen.

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. True

  2. False

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Correct Option: A
Explanation:

Thermal pollution is when an industry or other human-made organization takes in water from a natural source and either cools it down or heats it up. They then eject the water back into the natural resource, which changes the oxygen level and can have a disastrous effect on the local ecosystem. 

Environmental pollution can be controlled by:

evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

  1. spraying insecticides and pesticides

  2. the open burning of tree stumps

  3. treating factory wastes before disposing them

  4. disposing hot water from power stations into the sea

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Correct Option: C
Explanation:

Environmental pollution can be controlled by treating factory wastes before disposing of them. So, if we treat wastewater before disposing of in a river, it will surely decrease the amount of dumped pollutants. 

For example- Steel industries have a high concentration of cyanide in it, and it led to harmful effect. So, treatment is really necessary.