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By how much did carbon dioxide levels increase from 1980 to 2000? A.22 ppm B.32 ppm C.45 ppm D.51 ppm

By how much did carbon dioxide levels increase from 1980 to 2000? A.22 ppm B.32 ppm C.45 ppm D.51 ppm
asked 234k views
4 votes
By how much did carbon dioxide levels increase from 1980 to 2000?

A.22 ppm
B.32 ppm
C.45 ppm
D.51 ppm

asked
User Benhameen
by
7.2k points

1 Answer

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c. 45 ppm I believe :D
answered
User Sam Beckham
by
8.2k points
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