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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


Coal, once stable, zooms in price

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

By February 12, 2008


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