NPR Notícias de negócios: It's Not Easy, But Aspen Moves Toward 100 Percent Renewable Energy

It's Not Easy, But Aspen Moves Toward 100 Percent Renewable Energy
Since President Trump pulled out of the Paris climate deal, more cities are vowing to shift to 100 percent renewable power. We visit Aspen, Colo., to see how complicated that can be.

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