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Question
Which is true of the amount of C
in our atmosphere?A) C
is the most abundant gas in the atmosphere.B) The level of C
has been decreasing at the rate of 3.1% per year since 2000.C) The level of C
increased at the rate of 1.1% per year from 1990 to 1999.D) The level of C
has been much higher during the past 800,000 years than it is now. Answer
This answer is hidden. It contains 1 characters.
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