Global warming is dangerously close to becoming a religion.
When people are attacked for not agreeing with the "herd", it's not science.
When people are told "the debate is over", it's not science.
When people say "yes, there's some errors in it, but don't worry, they're don't impact the results", it's not science.
When the 'leading experts' in AGW have absolutely no background in climate science, it's not science (Tim Flannery has recently got a lot of press for his calculation that showed CO2 equivalent-whatever that is-is already over 450 ppm. Flannery is a mammologist and a palaeontologist, incidentally he's also selling his book "The Weather Makers: How Man Is Changing the Climate and What It Means for Life on Earth")