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Startup zaps nasty coal for cleaner burn

CoalTek signs a deal to build a plant in Inner Mongolia that upgrades low-grade coal by barraging it with microwaves to remove moisture.

By November 29, 2011

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Coal, once stable, zooms in price

You may not like it, but coal is high in demand.

By February 12, 2008

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FAQ: All about coal--a necessary evil

Coal is probably a fact of life. The problem is how to burn it. We answer some of questions surrounding the fuel and how scientists might make it more eco-friendly. Photos: Coal addiction

By December 3, 2007