Since energy consumption reduced at the world level in 2009, world CO2 emissions experienced decrease by more than 1% from 2008
. The OECD countries, which concentrated 45% of the total, experienced a 6% cut in its CO2 emissions. In both Europe and the USA, emissions was cut by 6% while in Japan reduction reached 10% since its energy consumption further decreased. China remained the world's largest emitter (more than 20% of the total). Both Chinese and Indian emissions increased at a strong pace (8%). Drops in CO2 emissions
were observed in the other world's region.