Model Economy as Physics Problem

University of Utah physicist Tim Garrett did a study and came to a conclusion similar to the WORLD model conclusions.

Perhaps the most provocative implication of Garrett's theory is that conserving energy doesn't reduce energy use, but spurs economic growth and more energy use.

It certainly challenges Amory Lovins' school of thought where sustainability can be achieved through new business models and practices. I don't think it necessarily precludes sustainable business, but it's not as straightforward as many sustainable business proponents would like to believe.