Sharp rise in CO2 levels recorded

By David Shukman
BBC science correspondent

US climate scientists have recorded a significant rise in the concentration of carbon dioxide in the atmosphere, pushing it to a new record level.

BBC News has learned the latest data shows CO2 levels now stand at 381 parts per million (ppm) - 100ppm above the pre-industrial average.

The research indicates that 2005 saw one of the largest increases on record - a rise of 2.6ppm.

The figures are seen as a benchmark for climate scientists around the globe.