7
QuizMultiple Choice
The Importance of Carbon
Question 7 of 14 • FL-2000310-Biology 1 A
Look at the levels of carbon dioxide in the data table below.Carbon in the AtmosphereBy how much did carbon dioxide levels increase from 1980 to 2000?
Answer
A
22 ppmB
32 ppmC
45 ppmD
51 ppm