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Nimaa Nimaa
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Posts: 1610
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9 years ago
Keeling's reports from Mauna Loa demonstrated ________.
A) an increase in tropospheric CO2 from the 1950s to present
B) that sediments deposited on the seafloor can yield clues about past climates
C) that as distances from cities decreased, CO2 concentrations increased
D) that CO2 levels have been stable over the last 40 years
E) the presence of El Niño
Textbook 
Essential Environment

Essential Environment


Edition: 4th
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wrote...
Valued Member
9 years ago
The answer should be A) an increase in tropospheric CO2 from the 1950s to present.
Nimaa Author
wrote...
9 years ago
Thank you for the answer, will use it.
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