15% or so of the world's population living in high-income countries are responsible for half of
"15% or so of the world's population living in high-income countries are responsible for half of the carbon dioxide (the principle greenhouse gas behind global warming) released by man-made sources. That is partly because the rich world also generates much of the world's economic activity. America for example, uses 16 times as much energy per person as India."
Source: World Bank report, The Economist, 5/10/03.