This set of Pollution Control Multiple Choice Questions & Answers (MCQs) focuses on “Global Warming – Set 2”.
1. Which of the following regions has had the highest surface temperature rise due to global warming?
a) The Arctic
b) The Antarctic
c) The Tropical regions
d) The Temperate regions
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Explanation: Global warming unevenly affects regions in the higher latitudes. Additionally, the northern hemisphere has more land mass than the southern hemisphere. The warming in the arctic is most significant because a large chunk of it is sea ice. Permafrost thawing is also a contributor.
2. If climate change is a natural phenomenon, then why are the current circumstances so concerning?
a) There is no cause for concern
b) Manmade global warming is accelerating climate change
c) The changes will have effects like no other
d) It is not a natural phenomenon
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Explanation: Climate change is a natural phenomenon, which occurs periodically. Plant and animal species were able to adapt to such changes in the past because these changes were slow. Global warming due to human-made forces is so rapid that the species cannot adapt to them.
3. What is the cause of global dimming?
a) Water vapour
b) Carbon dioxide
c) Aerosol particles
d) Ozone
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Explanation: Global dimming occurs when airborne particles reflect sunlight. Aerosol particles cause global dimming. Incomplete combustion of fossil fuels releases aerosol particles into the lower atmosphere. The lifetime of these particles is not long, though, approximately a week.
4. What is the relationship of global dimming with global warming?
a) Global warming affects global dimming
b) It does not affect global warming
c) It enhances the effects of global warming
d) It masks the effects of global warming
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Explanation: Global dimming occurs on account of aerosol particles in the atmosphere. These particles reflect the sunlight during daytime resulting in a lower percentage reaching the surface, in turn leading to lesser evaporation. Therefore, they ‘dim’ the effect of global warming.
5. Which of the following is NOT the reason why the north pole is warming at a faster rate than the south pole?
a) It has more sea cover
b) It has more sea ice
c) It has more land cover
d) It has more snow area
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Explanation: The south pole has solid land covered with ice, unlike in the north pole, which is dominated by sea ice. The arctic waters remain warm in the colder months, resulting in slower regeneration of the sea ice. These factors result in a higher rate of warming when compared to the south pole.
6. Which of the following is a secondary cause of climate change?
a) Release of greenhouse gases
b) Global warming
c) Change of surface land use
d) Fossil fuel combustion
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Explanation: Changes in patterns of land use is a secondary cause of climate change. Forest cover has reduced over the century due to urbanisation and agriculture. Conversion of forest land to agricultural land may result in more absorption of sunlight. It can also affect wind and rainfall patterns, among other things.
7. Carbon capture and storage (CCS), will not be required if we transition to low carbon energy sources.
a) True
b) False
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Explanation: Even with the transition to low carbon energy sources, carbon capture and its storage will be necessary. Carbon dioxide has a long lifetime in the atmosphere and may remain there to cause further warming. Thus, resulting in a need for its capture.
8. Which of the following statements about climate change is untrue?
a) Global warming causes climate change
b) Climate change includes global warming and its side effects
c) Climate change and global warming are often used interchangeably
d) Climate change is only a recent phenomenon
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Explanation: Climate change is not a recent phenomenon, and the earth’s climate has changed across history. Natural causes are the reason for these changes. The difference is that global warming due to human-made reasons has accelerated climate change, and the earth’s natural processes cannot keep up with them.
9. Which of the following is a potential effect of global warming on humans?
a) Displacement of human populations
b) Loss of forest cover
c) Loss of food
d) Displacement of water resources
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Explanation: Global warming and climate change have severe consequences on human populations. As the climate warms due to global warming, areas will become uninhabitable to humans. It could be a result of continued drought or land loss due to sea-level rise.
10. Who will be most affected due to global warming?
a) Middle-income populations
b) Low-income populations
c) High-income populations
d) There is no relationship between income and effects
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Explanation: Global warming and climate change will unevenly affect people from low-income backgrounds. That is because these communities are more likely to live in vulnerable areas.
11. How much will the global temperatures rise by the end of the century, if the emissions continue at the current rate?
a) Around 1.5 degrees Celsius
b) Around 2 degrees Celsius
c) Around 4 degrees Celsius
d) Around 8 degrees Celsius
View Answer
Explanation: If emissions remain steady in the upcoming years, global average temperatures are set to rise by 4 degrees Celsius by the end of the century. This is true if there is no further increase in emissions in the future.
12. Which countries made the International Solar Alliance?
a) France and Sri Lanka
b) India and Germany
c) France and Germany
d) India and France
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Explanation: India and France joined hands for the International Solar Alliance. This alliance was made in November 2015, during COP-21 in Paris, France. India’s goal is to implement 100 GW of solar energy by 2022.
13. Why are biofuels regarded as carbon-neutral fuels?
a) The plants they are made from absorb carbon dioxide as they grow
b) The plants they are made from release oxygen as they grow
c) They are made from plants
d) They are not regarded as carbon-neutral
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Explanation: The plants that are the sources of biofuel absorb carbon dioxide in their lifetime (which was only in the recent past). The carbon dioxide they generate as fuels is, hence, cancelled out as a result.
14. How do aerosols released from large volcanic eruptions affect the climate?
a) They warm the climate
b) They cool the climate
c) They do not have any effect on the climate
d) They have varied effects depending on the position
View Answer
Explanation: Huge volcanic eruptions eject aerosols into the upper atmosphere (stratosphere), where they remain for a few years. These particles reflect sunlight and cause long term cooling.
15. Which of the following is an example of natural carbon sequestration?
a) Atmosphere
b) Land
c) Ocean
d) Aerosols
View Answer
Explanation: Oceans and forests are natural carbon sequestration sources. The former dissolves the carbon dioxide from the atmosphere, while the latter uses it for photosynthesis. Beyond a tipping point, it is feared that these sinks may become carbon sources.
Sanfoundry Global Education & Learning Series – Pollution Control.
To practice all areas of Pollution Control, here is complete set of 1000+ Multiple Choice Questions and Answers.
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