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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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kendreae kendreae
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7 years ago
Which of the following is true regarding the concentration of CO2 in the lower atmosphere? 
A)  It is 1/3 higher than it was 1750.. 
B)  It has stabilized. 
C)  It is presently at 150 ppm. 
D)  It is unrelated to the amount of forest cover.
Textbook 
Geosystems: An Introduction to Physical Geography

Geosystems: An Introduction to Physical Geography


Edition: 7th
Author:
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One touch of nature makes the whole world kin.  William Shakespeare
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jo170jo170
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7 years ago
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kendreae Author
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7 years ago
this is exactly what I needed
kriggs62
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Yesterday
Thank you, thank you, thank you!
Mkersey12
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2 hours ago
Thanks
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