Figure Global income trajectories under BAU and in the case of stabilizing the atmosphere at 350 ppm, 450 and 550 ppm. Observe that we have assumed rather pessimistic estimates of the cost of atmospheric stabilization (average costs to the economy assumed here are $200/tC for 550ppm target, $300/tC for 450ppm and $400/tC for 350ppm) and that the environmental benefits (in terms of climate change and reduction of local air pollution) of meeting various stabilization targets have not been included. Source: Azar & Schneider (2002).