From Watts Up With That:
The issue of climate change (aka global warming) depends on the answers to three questions being “yes”.
1) Is the planet getting warmer?
2) Is the warming due to human activity?
3) Is this warming going to lead to disaster?
It seems 96% of atmospheric scientists answer question 1 as “yes”.
In another survey, 29% of scientists surveyed say it’s entirely human activity, and 38% say “mostly” (60-80%) human activity.
In a third survey, half believe the effects will be primarily (47%) or exclusively (3%) negative over the next half century.
So, the consensus for an anthropogenic climate change disaster is
96% X 67% X 50% = 32%.
It would be interesting to see the answer to a question 2A) “Can humans significantly reverse the warming of the planet?”
Charts and details at the link up top.