Carbon dioxide crosses 400 ppm mark
Breach indicates sources of CO2 emissions in the US have gone up
Climate talks in Bonn conclude but no deal in sight
To revise or not to revise Annexes remains the central divisive issue
Countries haven’t done enough to combat climate change: Figueres
Future of Kyoto Protocol the focus of Panama climate meet
2011: 10th warmest year on record
Arctic sea ice at its lowest in 2011, says World Meteorological Organization report
Canada pulls out of Kyoto Protocol
Loses moral position to call on developing countries to limit emissions