New Scientist: It’s been a busy week for climate change campaigners. First, a gathering of Nobel laureates at St James’s Palace, London, declared world governments must take bold and quick action to avert catastrophic climate change. Then, on Friday, Kofi Annan piled on the pressure, throwing his weight behind the first report investigating the impact of climate change on humans. The 20 Nobel prize-winning scientists, economists and writers signed a memorandum (pdf format) calling for an agreement …