The IPCC fourth assessment report concluded it is "likely" that global warming is human-induced.

IPCC第四次评估报告推断，全球变暖“极有可能”是人为造成的。

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His hockey stick, which purported to demonstrate the link between man-made carbon emissions and catastrophic global warming, was the central pillar of the IPCC's 2001 Third Assessment Report, and it brought him near-legendary status in his community.

WSJ: James Delingpole: Climategate 2.0

The Intergovernmental Panel on Climate Change's (IPCC) fourth and most recent assessment report (AR4) was published in 2007.

CNN: Climate change: Time is running out

Some reveal disturbing scientific improprieties connected with preparation of the UN Intergovernmental Panel on Climate Change (IPCC) Climate Change 2007: Fourth Assessment Report (commonly referred to as AR4).

FORBES: Michael Mann And The ClimateGate Whitewash: Part One