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Question
The atmospheric concentrations of carbon dioxide and CH4 have increased by ________ percent and ________ percent respectively above pre-industrial levels since 1750.
Options
21, 139
40, 160
40, 140
32,150
MCQ
Fill in the Blanks
Solution
The atmospheric concentrations of carbon dioxide and CH4 have increased by 40 percent and 140 percent respectively above pre-industrial levels since 1750.
Explanation:
The National Oceanic and Atmospheric Administration (NOAA) has released its yearly inventory of 20 major greenhouse gases.
Since 1750, atmospheric carbon dioxide and CH4 concentrations have increased by 40% and 140 percent, respectively, above pre-industrial levels.
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Introduction to Environment and Sustainable Development
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