Amager Bakke Waste-to-Energy Plant. (Courtesy BIG)

Against all odds, BIG-founder Bjarke Ingels is actually building a mountain-slash-ski-slope-slash-waste-to-energy-power-plant in his hometown of Copenhagen. Announced in 2011, the project nearly stalled during the approval process, but officials in the Danish capital broke ground on the facility on Monday. Called the Amager Bakke Waste-to-Energy Plant, the structure represents Ingels’ concept of Hedonistic Sustainability, the notion that a sustainable building shouldn’t only be green, but should also be fun.

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