The average American, by driving a car, eating a diet rich in the products of industrialised farming, keeping cool in summer and warm in winter, and consuming products at a hitherto unknown rate, uses more than fifteen times as much of the global atmospheric sink as the average Indian. Thus Americans along with Australians, Canadians, and to a lesser degree Europeans, effectively deprive those living in poor countries of the opportunity to develop along the lines that the rich ones themselves have taken. If the poor were to behave as the rich now do, global warning would accelerate and almost certainly bring widespread catastrophe.