Refusing to talk about running out of oil

Every generation has its taboo, and ours is this: that the resource upon which our lives have been built is running out. We don't talk about it because we cannot imagine it. This is a civilisation in denial.

Oil itself won't disappear, but extracting what remains is becoming ever more difficult and expensive. The discovery of new reserves peaked in the 1960s. Every year we use four times as much oil as we find. All the big strikes appear to have been made long ago: the 400m barrels in the new North Sea field would have been considered piffling in the 1970s. Our future supplies depend on the discovery of small new deposits and the better exploitation of big old ones. No one with expertise in the field is in any doubt that the global production of oil will peak before long.

The only question is how long. The most optimistic projections are the ones produced by the US department of energy, which claims that this will not take place until 2037. But the US energy information agency has admitted that the government's figures have been fudged: it has based its projections for oil supply on the projections for oil demand, perhaps in order not to sow panic in the financial markets.

Other analysts are less sanguine. The petroleum geologist Colin Campbell calculates that global extraction will peak before 2010. In August, the geophysicist Kenneth Deffeyes told New Scientist that he was "99% confident" that the date of maximum global production will be 2004.