In this 2006 photo, a coal train travels in northeast Wyoming near Gillette. Wyoming produces 39 percent of the nation’s coal supply.
In this 2006 photo, a coal train travels in northeast Wyoming near Gillette. Wyoming produces 39 percent of the nation’s coal supply. NATI HARNIK AP File Photo
In this 2006 photo, a coal train travels in northeast Wyoming near Gillette. Wyoming produces 39 percent of the nation’s coal supply. NATI HARNIK AP File Photo

Dan Morain: Can California turn the West green?

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