BBC: Keeping global temperature rise under 2C (3.7F) will be almost impossible unless carbon emissions begin to fall within a decade, analysis suggests. The conclusion comes from a study by the UK Met Office (UKMO). Even if emissions peaked in 2020, there would be a 50% chance of temperatures rising by more than 2C, the target adopted by the G8 at its July summit. Meeting the lower target of 1.5C favoured by some developing countries is virtually impossible, the UKMO …