The Intergovernmental Panel on Climate Change (IPCC) has found that the concentration of atmospheric carbon dioxide has increased by how much in the past 250 years?
A. 150%
B. 65%
C. 35%
D. 100%
Answer:C
The Intergovernmental Panel on Climate Change (IPCC) has found that the concentration of atmospheric carbon dioxide has increased by how much in the past 250 years?
A. 150% B. 65% C. 35% D. 100%