THE mood music has certainly changed. A report for the US Congress describing the activities and plans for the national Climate Change Science Program (www.climatescience.gov) states in clear terms that increases in global temperature over the past 50 years are “unlikely to be due only to natural climate variations”. And it lays the blame for some of the warming on greenhouse gases (see “Bush’s U-turn”).
Until now, the Bush administration has gone out of its way to distance itself from statements about human-induced climate change. President Bush dismissed a 2002 report by the State Department which predicted dire consequences…
