Question

Which of the following is not a possible effect of rising carbon dioxide levels on plants?
a.
increased photosynthesis
b.
increased plant mortality
c.
increased crop productivity
d.
increased plant growth


Please select the best answer from the choices provided

A
B
C
D

Answer 1

B

Rising CO2 typically stimulates photosynthesis (CO2 fertilization), promoting plant growth and often increasing crop productivity. Increased plant mortality is not a direct expected effect of higher CO2 (though indirect effects of climate change, pests, or nutrient limits can increase mortality).