In 2009, Wyoming was riding high on coal. It supplied the coal that provided roughly half the nation’s power generation. The trains out of the Powder River Basin were almost non-stop, delivering the sub-bituminous low-sulphur coal from Wyoming’s subterranean to plants as far as Florida. The Sierra Club had mounted a campaign in which it made fun of coal as a “dirty fuel.” One striking video had a lively young couple in the upper bunk delighting in the company of one another, and in the lower bunk a more pudgy young man fondling lumps of coal. Still, when this author visited Gillette, the center of the Powder River Basin, in April 2009 for a story published in Planning magazine, no evidence of great worry was evident.