Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us -- it's the Week in Green.
March marks the start of spring, and this week we saw lots of fresh new unveils in the world of green architecture -- including the futuristic winners of the 2013 eVolo Skyscraper Competition. This year's winner was the Polar Umbrella, a buoyant skyscraper designed to rebuild the shrinking polar ice sheets affected by global warming. Some of our other favorites are these jellyfish-shaped PH Conditioner Skyscrapers, which combat air pollution while producing fresh water, and Project Nomad, an out-of-this-world mobile skyscraper that could terraform Mars to make it habitable by humans. Meanwhile architect Michael Charters designed "Big Wood," a prototype for a large-scale wooden skyscraper in downtown Chicago.