The Editorial 'Light at the end of the tunnel' (Nature 445, 567; 2007) should have referred to projects such as the Thames Barrier as 'adaptation' not 'mitigation'. In the related News story 'What we don't know about climate change' (Nature 445, 580; 2007), the 2001 IPCC estimate for the range of sea-level rise should have read 9 to 88 centimetres, not millimetres.