Photo: The End of Oil? Breakthrough Turns Coal Into Clean Diesel

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Machinery extracts coal from a mine in Wyoming. Scientists have developed a technology that can turn byproducts from the production of fossil fuels into a clean-burning diesel fuel.

In the U.S., policymakers in coal-rich states have touted the technology as a future source of homegrown diesel.

Photograph courtesy U.S. Bureau of Land Management

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