Independent Online Edition > Environment: "Every enhanced production technique invented has been tried and tested in American oilfields. But it has all made no difference to the remarkable symmetry of the up-and-down curve that expressed Hubbert's thinking. The US is just short of halfway down the second half of the curve now. In other words, it has used up some three-quarters of its original endowment of recoverable oil. Given its almost total lack of attention to the efficiency with which oil is burned, the US becomes more dependent on foreign oil imports by the day....The American pattern of historical oil discovery and production is only a loose guide to what is going on in the rest of the world."