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The atmospheric concentrations of carbon dioxide and CH4 have increased by ____ per cent and ____ per cent respectively above pre-industrial levels since 1750
- a)32, 150
- b)21, 139
- c)33, 160
- d)31, 149
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The atmospheric concentrations of carbon dioxide and CH4 have increase...
The correct option is Option D. The atmospheric concentrations of CO2 and CH4 have increased by 31% and 149% respectively above preindustrial levels since 1750.
Most Upvoted Answer
The atmospheric concentrations of carbon dioxide and CH4 have increase...
The increase in atmospheric concentrations of carbon dioxide and CH4 is due to human activities such as burning fossil fuels, deforestation, and agriculture. The correct answer is option 'D', which states that atmospheric concentrations of carbon dioxide and CH4 have increased by 40 per cent and 160 per cent respectively above pre-industrial levels since 1750.
Explanation:
Pre-industrial levels refer to the concentrations of greenhouse gases in the atmosphere before the Industrial Revolution, which began in the mid-18th century. The burning of fossil fuels and other human activities since then have increased the concentrations of these gases in the atmosphere, leading to global warming and climate change.
The atmospheric concentration of carbon dioxide has been measured directly since the late 1950s, primarily at the Mauna Loa Observatory in Hawaii. The current concentration of carbon dioxide in the atmosphere is around 415 parts per million (ppm), which is about 40 per cent higher than the pre-industrial level of around 280 ppm.
Similarly, the atmospheric concentration of CH4 has also increased due to human activities such as agriculture, livestock farming, and fossil fuel production. The current concentration of CH4 in the atmosphere is around 1,870 parts per billion (ppb), which is about 160 per cent higher than the pre-industrial level of around 700 ppb.
The increase in greenhouse gas concentrations in the atmosphere has contributed to global warming and climate change, which has led to changes in sea levels, weather patterns, and ecosystems. It is important to reduce greenhouse gas emissions to mitigate the impacts of climate change and ensure a sustainable future.
Explanation:
Pre-industrial levels refer to the concentrations of greenhouse gases in the atmosphere before the Industrial Revolution, which began in the mid-18th century. The burning of fossil fuels and other human activities since then have increased the concentrations of these gases in the atmosphere, leading to global warming and climate change.
The atmospheric concentration of carbon dioxide has been measured directly since the late 1950s, primarily at the Mauna Loa Observatory in Hawaii. The current concentration of carbon dioxide in the atmosphere is around 415 parts per million (ppm), which is about 40 per cent higher than the pre-industrial level of around 280 ppm.
Similarly, the atmospheric concentration of CH4 has also increased due to human activities such as agriculture, livestock farming, and fossil fuel production. The current concentration of CH4 in the atmosphere is around 1,870 parts per billion (ppb), which is about 160 per cent higher than the pre-industrial level of around 700 ppb.
The increase in greenhouse gas concentrations in the atmosphere has contributed to global warming and climate change, which has led to changes in sea levels, weather patterns, and ecosystems. It is important to reduce greenhouse gas emissions to mitigate the impacts of climate change and ensure a sustainable future.
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The atmospheric concentrations of carbon dioxide and CH4 have increase...
As per ncert book of Indian Economic Development page no. 165 ,it is clearly written that these gases concentration increased by 31 and 149 percent. So option c is correct not option D.
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