The historic city of Philadelphia hasn't been known for its skyline in a long time. Now, some developers want to change that with a proposal to construct what would become the tallest building in the Western Hemisphere and the second-tallest building in the world, standing at 1,500 feet, with a very-high degree of energy and water efficiency.
skyscrapers

World's Second Tallest Building To Be Green?
(via www.thedailygreen.com)
Submitted by socialpyramid on Mon, 2008-03-17 15:50. | Tags: architecture | american commerce center | energy efficiency | green building | philadelphia | skyscrapers
City parks take to the skies
(via www.jamblemag.co.uk)
Urban parks are on the rise, literally. Across the globe public parks are sprouting on the roofs of skyscrapers and high-rises, transforming barren swathes of concrete into green oases with scenic views and clean air – and all far above the busy city streets.
Submitted by jamble on Wed, 2007-08-15 07:38. | Tags: architecture | parks | skyparks | skyscrapers