
Hopes of unlocking the vast amounts of renewable energy trapped deep underground in hot rocks have received a double boost, with Google.org and, separately, the Australian government putting significant funds into the technology.
The web search company's philanthropic arm announced that it will invest more than $10m (£5.4m) into ways to tap geothermal energy in locations where the technology has traditionally not been applied. The money is part the organisation's wider mission to find renewable energy sources that could replace coal in the future.
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