Some links debunking the myth that there is no scientific consensus:
The Consensus on Global Warming: From Science to Industry & Religion
Scientific opinion on climate change
Climate myths: Many leading scientists question climate change
The Scientific Consensus on Climate Change: How do we know we're not wrong
Myth: Naomi Oreskes' study on consensus was flawed
Myth: There is no consensus
Myth:Less than half of published scientists endorse global warming