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Home Q & A Board Biology-Related Homework Help General Biology
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purpleberry purpleberry
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7 years ago
According to the graph, by how many parts per million has the concentration of atmospheric carbon dioxide changed between 1980 and 2010?
A) about 20 ppm
B) about 50 ppm
C) about 80 ppm
D) about 110 ppm
Textbook 
Biology: Science for Life with Physiology

Biology: Science for Life with Physiology


Edition: 5th
Authors:
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KhoshabaKhoshaba
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7 years ago
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purpleberry Author
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#2
6 years ago
Great answer!!!
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