What is the approximate variation in CO2 concentration each year?

The question is based on Figures 24-8 and 24-9, charts showing the change in atmospheric carbon dioxide measured at the Mauna Loa Observatory in Hawai‘i, from 1958 to April 2016.





What will be an ideal response?


6 to 7 ppm

Environmental & Atmospheric Sciences

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Which of the following processes is primarily responsible for the sky's blue color?

A. filtering B. scattering C. absorption D. reflection

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The cycle of phases of the Moon is the basis for our month

Indicate whether the statement is true or false

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What is the general term for a gap in the geologic rock record that represents a period of non-deposition, erosion, or both?

A)nonconformity B)disconformity C)angular unconformity D)anticonformity E)unconformity

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