Unlikely: Al Gore claims only 34 out of 33,700 deny human-caused global warming

Actually, 31,072 American scientists signed a petition rejecting the assertion that global warming has reached a crisis stage and is caused by human activity.

.@sxsw I was asked about the # of scientists that deny human-caused global warming. The answer? 34 out of 33,700 bit.ly/Y4LZkd
— Al Gore (@algore) March 11, 2013