Guardian: Talks must start urgently on the world's "carbon budget" the amount of greenhouse gas that can be poured into the atmosphere without triggering dangerous climate change as without radical policies to cut emissions humanity will exceed the limit within 15 to 25 years, the world's leading climate economist has warned.
Lord Stern, the former World Bank chief economist and author of the landmark study of the economics of global warming, said the world faced a stark choice. On Friday, after days...