Moss (1998) appears to take human-induced global warming as a proven fact, despite quoting from the 1995 report of the Intergovernmental Panel on Climate Change (IPCC 1996) that the `balance of evidence now suggests that there is a discernible human inf luence on global climate' (my italics). Hulme et al. (1999) were, however, unable to distinguish the human impact on climate from natural meteorolo


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