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
A
B
C
D

Answer 1

D

Option D ("Carbon dioxide is an insignificant greenhouse gas") does not support global warming — it contradicts the greenhouse-gas mechanism that contributes to warming.