CO2 Row Threatens Climate Report

From the BBC: “Environmentalists fear that a key climate report to be published this week is using outdated science, and will lead to dangerous climate change. Campaigners say most of the research for the IPCC's economics report is based on a safe limit of atmospheric CO2 being 550 parts per million (ppm). But more recent scientific studies now put that figure at 450ppm, they argue...."