Question

which of the following is not a theory supporting global warming? a. it is predicted that the average temperature will rise 1.4° c or more over the next 100 years. b. human activity has increased greenhouse gases. c. over the last 100 years the earth has warmed by 0.74° c d. carbon dioxide is an insignificant greenhouse gas. please select the best answer from the choices provided

Explanation:

Carbon dioxide is a major greenhouse gas. Options a, b, and c are all valid aspects supporting the theory of global - warming. Option d is incorrect as carbon dioxide is a significant contributor to the greenhouse effect and global warming.

Answer:

D. Carbon dioxide is an insignificant greenhouse gas.