Photos: Sizing up Chicago's green high rises

The luxury tower at 340 On the Park packs 350 condominiums and two green roofs into 61 stories. It is the first residential tower in Chicago to win LEED certification. Builders recycled 82 per cent of construction waste. They used recycled concrete, steel and drywall as well as interior materials that are low in volatile organic compounds.

Bamboo floors are standard for each condominium, and the building offers owners green cleaning options. Sensors control kitchen, bath and laundry fans, which are turned off when not in use. A two-bedroom, 177-square-metre condo is priced above $1m (£484,000).

Credit: Gregory Wenzel