Question

Why are carbon dioxide concentrations expected to increase?
a.
Carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase.
b.
Carbon dioxide concentrations are expected to increase, because of an increase in agriculture.
c.
Carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use.
d.
All of the above


Please select the best answer from the choices provided

A
B
C
D

Answer 1

D

All of the above. Burning fossil fuels, expanding agriculture, and clearing land (deforestation) each release CO2 (and other greenhouse gases), so together they drive rising atmospheric CO2.