YouTube - Incontrovertible Evidence Proving Global Warming is Man Made

The data is clear and 31,478 American scientists weigh in with their opinions.

Sir Nicholas Stern: Climate change deniers are 'flat-earthers' | Environment | guardian.co.uk

Economist Nicholas Stern warns of 'absolute lunacy' of do-nothing approach of Czech president Václav Klaus and fellow climate change sceptics
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Climate change deniers are "ridiculous" and akin to "flat-earthers", according to Sir Nicholas Stern, who advised the government about the economic threat posed by global warming. The respected economist compared climate naysayers to those who deny the link between smoking and cancer or HIV and Aids in the face of mounting scientific evidence.

Sceptics meeting rejects climate crisis

The claims aired at the conference include that global warming is a political movement rather than a scientific one; solar activity is responsible for most of recent warming despite latest studies to the contrary; natural variations on Earth are doing more warming than humans’ burning of fossil fuels; and that President Obama’s cap and trade plan will unnecessarily damage the economy.

On the basis of its interpretation of surveys of scientists, the Heartland Institute maintains that the “mainstream of the scientific community … does not believe global warming is a crisis”.