Over in Europe and Egypt, architecture students are putting the final touches on their Solar Decathlon 2012 projects.

ENGADGET: Inhabitat's Week in Green: Eindhoven's Evoluon Center, folding compact cars and the best of 3D printing

We also showcased several feats of futuristic architecture -- a skyscraper zoo with a built-in ferris wheel and a shape-shifting solar bridge that purifies the air.

ENGADGET: Inhabitat's Week In Green: solar-powered stadium, bipod flying cars and biofueled flights