Copenhagen's future waste-to-energy plant features the a ski slope and a smokestack that will blow "rings" of CO2, which each represent one ton of emissions. Combining a environmentally sustainable building with a social program—the ski slope—represents Ingels' theories of "hedonistic sustainability" and "bigamy." Photo via B.I.G.  Photo 2 of 4 in Bjarke Ingels on 'Bigamy'

Bjarke Ingels on 'Bigamy'

2 of 4

Copenhagen's future waste-to-energy plant features the a ski slope and a smokestack that will blow "rings" of CO2, which each represent one ton of emissions. Combining a environmentally sustainable building with a social program—the ski slope—represents Ingels' theories of "hedonistic sustainability" and "bigamy." Photo via B.I.G.