When carbon dioxide is increased in the atmosphere, it leads to ________.
- A.Global warming
- B.Air pressure
- C.Conservation
- D.Rains
Correct answer
Explanation
The correct answer is A, global warming. Carbon dioxide is a greenhouse gas: it lets in the short wave radiation of the sun but absorbs a part of the long wave infrared radiation that the warmed earth sends back, and radiates it downwards again. As its concentration rises with the burning of coal, oil and gas and with deforestation, more heat is held in the lower atmosphere and the average surface temperature of the earth rises. That rise is global warming, and it is the central driver of present day climate change.
Option B, air pressure, depends on temperature, altitude and the mass of air above a place, not on the share of a trace gas. Option C, conservation, is the protection and wise use of resources and is a human activity, not a consequence. Option D, rains, may change in pattern as the climate warms, but that is an indirect effect rather than the direct result asked for here.
Read the full article: Climate Change and Global Warming: Notes for Exams
Practice Questions
View allThe Intergovernmental Panel on Climate Change (IPCC) was established in 1988 by which two organisations?
- A.UNESCO and FAO
- B.The World Meteorological Organization and the United Nations Environment Programme
- C.The World Bank and the IMF
- D.WHO and the United Nations Development Programme
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The two bodies set up the panel in 1988 so that governments would have a single authoritative summary of what science says about climate change.
Read the full explanation →The United Nations Framework Convention on Climate Change was adopted at which conference?
- A.The Stockholm Conference, 1972
- B.The Earth Summit at Rio de Janeiro, 1992
- C.The Johannesburg Summit, 2002
- D.The Copenhagen Conference, 2009
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The United Nations Conference on Environment and Development, popularly called the Earth Summit, produced the Framework Convention on Climate Change along with the Convention on Biological Diversity and Agenda 21.
Read the full explanation →The Kyoto Protocol, which set binding emission targets, was adopted in which year?
- A.1987
- B.1992
- C.1997
- D.2005
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The Kyoto Protocol was adopted at the third Conference of the Parties held in the Japanese city of Kyoto in 1997, and it came into force in 2005 after enough countries had ratified it.
Read the full explanation →Under the Paris Agreement of 2015, countries agreed to hold the rise in global average temperature to:
- A.Well below 2 degrees Celsius above pre-industrial levels, pursuing efforts towards 1.5 degrees
- B.Exactly 3 degrees Celsius above present levels
- C.Below 5 degrees Celsius by the year 2100
- D.No numerical limit at all
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The Paris Agreement, adopted at the twenty-first Conference of the Parties in 2015 and in force from November 2016, commits its parties to holding the increase in the global average temperature to well below two degrees Celsius above pre-industrial levels and to pursuing efforts to limit the increase to one…
Read the full explanation →Which of the following gases has the highest global warming potential?
- A.Carbon dioxide
- B.Methane
- C.Nitrous oxide
- D.Sulphur hexafluoride
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Global warming potential measures how much heat a mass of a gas traps over a chosen period compared with the same mass of carbon dioxide, which is given the value one.
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