Geothermal: what the frack is wrong with that?
The most promising renewable energy of all is making pro-renewable Greens frightened and angry. It’s geothermal energy, which taps into the natural warmth below Earth’s surface, providing an abundant heat source.
Geothermal exploitation used to be about finding and retrieving hot water – but new technology allows water to be sent into deep fissures several thousand feet down, where it meets hot dry rock, and comes out piping hot.
The problem? New geothermal techniques requires hydraulic fracturing, or fracking, and environmental crusaders have convinced themselves that fracking is evil. Thanks to misleading propaganda such as the movie Gasland, campaigners fear contamination of the water table and apocalyptic earthquakes. (For some Greens, the world is a disaster movie set to loop.)
Yet the water contamination so dramatically illustrated in Gasland, with domestic water taps jetting out fire, preceded fracking by decades: it’s caused by methane much nearer the surface. The risk of small quakes, undetectable by humans, from fracking is similar to the risk posed by coal mining. And the chemical lubricants used in the process, while similar to antifreeze, are well regulated and are being superseded by organic alternatives.
But environmentalists are scoring some victories. A project called AltaRock in Oregon has been cancelled, despite environmental studies that the fracturing process was safe and posed no significant risk. A fascinating feature from the Greenwire news service captures the frustration.