One the eve of the Copenhagen climate conference, Global Footprint Network is releasing data today that reveals a growing gap between human demand on ecological services and the rate at which nature can supply those services.

It would now take nearly one and a half Earths to generate all the resources humanity consumes and absorb all our CO2 emissions, according to the latest Ecological Footprint and biocapacity calculations. These figures are based upon source data from 2006, the most recent year for which such data are available.