Why are carbon dioxide concentrations expected to increase?
a. Carbon dioxide concentrations are expected to increase, because fossil fuel burning is expe
increase
b. Carbon dioxide concentrations are expected to increase, because of an increase in agricultu
c. Carbon dioxide concentrations are expected to increase, because more land will have to be
for increasing populations and agricultural use.
d. All of the above
Please select the best answer from the choices provided
A
B
C
D