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Faced with the evidence, many deniers have started to admit that global warming is real, but argue that humans have little or nothing to do with it.

Those who say that climate change doesn't exist are being understood as the flat-earthers that they are, as the people who deny the link between smoking and cancer, as the people who denied the link between HIV and AIDS.

My first inclination is to be a bit skeptical about the claims that human-produced carbon dioxide is the direct contributor to global warming.

Many of the alarmists on global warming, they've got a problem because the science doesn't back them up.

We can look back through ice-core data and see over 800,000 years, relationships between carbon dioxide and the temperature of the world. So those people who deny the importance of climate change are just wasting their time. They're also being diversionary because if we don't act the risks are enormous.

Climate change - for so long an abstract concern for an academic few - is no longer so abstract. Even the Bush administration's Climate Change Science Programme reports 'clear evidence of human influences on the climate system.'

There is no significant man-made Global Warming underway and the science on which the computer projections of weather chaos are based is badly flawed.

The global warming hysterics don't just offer opinions and beliefs about greenhouse gases and the like. These are people who speak as if they belong to a cult.