The Intergovernmental Panel on Climate Change (IPCC) has set a target for developed economies of an 80% reduction in CO2e emissions by 2050 (2.65% per annum), based on 1990 levels.The median absolute emissions reduction reported by Global 500 companies to CDP in 2011 is 4.4% for the year. If  reductions could be made annually by all companies at this rate, the IPCC target could be achieved in the long term.  >> CDP