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Nature 449, 14-15 (6 September 2007) | doi:10.1038/449014a; Published online 5 September 2007

Open Innovation Challenges

King coal constrained

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Sustained high oil prices won't be enough to make coal liquefaction economically viable without large-scale public investment. Katharine Sanderson reports.

Turning dirty coal into a clean-burning liquid fuel remains something of a challenge for the energy industry. As scientists heard last month at the annual meeting of the American Chemical Society in Boston, Massachusetts, the process behind coal liquefaction might be well known — but its large-scale adaptation could still be some time off.