According to a 2007 IPCC report, with what amount of probability is it that human activities have been the leading cause of the observed atmospheric warming?
A) at least 50%
B) at least 60%
C) at least 70%
D) at least 80%
E) at least 90%

Question

Quizplus · Accepted Answer

According to the 2007 IPCC report, there is at least a 90% probability that human activities, particularly the burning of fossil fuels, have been the leading cause of observed atmospheric warming since the mid-20th century.

According to a 2007 IPCC Report, with What Amount of Probability