Kicked in the hot rocks

ENVIRONMENTALISTS and other believers in so-called "hot rock" energy have been having a rough ride recently. Not that they can blame Slugcatcher who warned them several years ago to drop the nonsense of trying to produce commercially competitive electricity from deeply buried radioactive rocks.

Conventional energy sources such as oil, gas, coal and nuclear can do the job at a far cheaper price and more reliably than via geothermal heat extracted from deep beneath the earth's surface.