Less oil than they thought

It may be that the oil crunch would come sooner than expected -Shell in line with a number of other oil exploiters has downsized its estimate of global reserves. Nearer then draws the time that shall surely be making it uneconomic to run the energy of the world as we have been. It could be good news for the climate if it wasn't for the fact that the greenhouse effect has already kicked in and we can't wait for market forces in this case to deliver the best change.