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Commentary

Nature 411, 17-19 (3 May 2001) | doi:10.1038/35075167

What is 'dangerous' climate change?

Stephen H. Schneider1

  1. Stephen H. Schneider is in the Department of Biological Sciences, Stanford University, Stanford, California 94305, USA.
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To combat global warming, we must first assess just how likely it is to occur.

In the third assessment report of the Intergovernmental Panel on Climate Change (IPCC), the climate modellers of working group 1 (see Box 1 for glossary) dramatically revised upwards the top-range limit of their predictions of global warming from the previous value of 1–3.5 °C to 1.