IN SEPTEMBER 2004 Thomas Knutson, a climate modeller at the US National Oceanic and Atmospheric Administration, published a paper suggesting that increases in atmospheric carbon dioxide would lead to more intense hurricanes. Ten months later, when further research supported this link, Knutson was invited to comment by a TV station. Before he could appear, however, a NOAA press officer informed him that his slot had been cancelled, because “the White House said no”. All further media enquires were routed to a researcher who contested the link between hurricane intensity and global warming.
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