This article lists the top 10 "ecologically sound greenscrapers" that show how designers "have risen to the challenge of designing and constructing buildings that combine quality and style with energy efficiency and environmental sustainability." It includes 340 on the Park, the second-biggest all-residential tower in Chicago; New York City's Hearst Tower, the first building in the city to achieve LEED Gold status; and the city's Bank of America Tower, which features an urban garden and green roof spaces.