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Which Is True of the Amount of C in Our

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Which is true of the amount of C 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. in our atmosphere?


A) C 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. is the most abundant gas in the atmosphere.
B) The level of C 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. has been decreasing at the rate of 3.1% per year since 2000.
C) The level of C 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. increased at the rate of 1.1% per year from 1990 to 1999.
D) The level of C 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. has been much higher during the past 800,000 years than it is now.

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