Consider the following statements : (a) Earth would be safer without greenhouse effect (b) Major contribution to the greenhouse effect comes from carbon dioxide (c) Earth’s climate was changing even before man appeared on earth Which of the above statements are correct?
(b) and (c) only
Judge each statement about the greenhouse effect and climate.
Statement (a) is FALSE. The natural greenhouse effect keeps the Earth warm enough to support life; without it the average surface temperature would fall to about \(-18^{\circ}\mathrm{C}\) instead of the habitable \(15^{\circ}\mathrm{C}\). So the Earth would be far less safe, not safer, without the greenhouse effect. (The problem is the enhanced greenhouse effect, not its very existence.)
Statement (b) is TRUE. Among the man-made greenhouse gases, carbon dioxide (CO₂), released mainly by burning fossil fuels, makes the single largest contribution to the enhanced greenhouse effect.
Statement (c) is TRUE. Geological evidence (ice ages, warm periods) shows Earth's climate has always varied through natural cycles long before humans appeared. Human activity has accelerated recent change, but natural climate change predates us.
Statements (b) and (c) are correct while (a) is wrong. Hence, the answer is (b) and (c) only.
Similar Questions
Amongst the following Green House Gases (GHGs), whose Global Warming Potential (GWP) is considered as 1?
In the context of climate change which of the following observations are correct for 20th century with reference to 1750?
A. The global average surface temperature has increased by 0.6°C.
B. Greater increase in daytime temperature than night time has been observed.
C. Global average sea level rose 0.1-0.2 m largely due to thermal expansion.
D. The atmosphere concentration of Carbon dioxide (CO2) has increased by 31%.
E. Precipitation in the northern hemisphere has decreased by 1% per decade.
Choose the correct answer from the options given below:Which of the following Green House Gases has no natural source?
Given below are two statements :
Statement I : In many cases, both organisms and human infrastructure will not be able to move or adapt quickly enough to changing climate.
Statement II : Infectious diseases are likely to increase as a result of global warming.
In the light of the above statements, choose the most appropriate answer from the options given below :Full form of IPCC, a nodal agency in the context of climate change, is:
Given below are two statements
Statement I: Increased carbon dioxide concentration in the ambient atmosphere is likely to make the world's oceans less acidic.
Statement II: Increased carbon dioxide concentration in the ambient atmosphere is likely to impact the coral reefs adversely.
In light of the above statements, choose the correct answer from the options given below:Suppose the concentration of Carbon dioxide, a greenhouse gas responsible for climate change, is 400 ppm. What is its concentration in air in percentage terms?
How many National Missions of the Indian Government are there to address the problem of climate change?
In terms of total $CO_2$ emissions from a country, identify the correct sequence:
In order to avoid catastrophic consequences of climate change, there is general agreement among the countries of the world to limit the rise in average surface temperature of earth compared to that of pre-industrial times by
Important Questions from Climate Change & Global Warming
Greenhouse gas, which is present in the highest quantity in the atmosphere, is
Which one of the following gases have higher Global Warming Potential?
Which of the following two sources of carbon is released?
A) Volcanic eruption
B) Combustion of fossil fuels
C) Landslide
D) Open mining
Choose the correct answer from the options given below:
Considering the global warming potential of CO 2as one, the global warming potential of CH 4has been estimated to be approximately :
Which of the following gas is not involved in the production of acid rain?
