15 Mind-Blowing Skyscrapers (PICTURES)

From Inhabitat:

With world populations growing and land scarce, more and more architects are looking to build upwards instead of outwards. Want some visual proof? Check out this collection of incredible vertical farms, bio-fuel power plants and skyscraper cities showcasing some truly innovative ideas on how to rethink what urban landscapes should look like. It just might be a glimpse into our future!