Emeritus Professor of Physics at Imperial College Keith Barnham says fracking companies could follow Greenfield Energy, now drilling below the carparks of a leading supermarket chain for geothermal heat. Most scientists agree we cannot burn more than one-third of the world’s proven fossil fuel reserves if we are to slow global warming. Why exploit new, unproven gas resources of uncertain yield? At far shallower depths there is sufficient geothermal energy to heat and cool buildings.
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