Coal's resurgence sparks debate

At a time when oil is $70 per barrel and worldwide energy demand is escalating faster than ever, coal seems to have emerged as America's answer to the nation's energy future.

Production is on the rise nationwide -- even more so in Wyoming, where federal regulators have churned out billions of tons of new coal leases in recent years. And a growing number of conservationists who once rallied against coal are now embracing the possibility of transitioning America's fleet of old coal power plants to cleaner gasification technologies.

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