It is easy to be dismissive of the Climate Change / Global Warming Deniers1, but it is a mistake to ignore them.
The fact is the Denial machine has been effective, that’s why industry funds it. Polls show almost half of US citizen’s think that the current warming / climate change is natural. Lest you think this is perhaps due to the complexity of the climate issue or some such, I note that it is about the same number of people who are unsure if Obama is a Muslim. Hardly a complex issue, but one which is also plagued by lies and disinformation.