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.

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.

Quizplus · Accepted Answer

The Answer of 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.

Which Is True of the Amount of C in Our