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.

Solar-powered buildings heated up this week as Inhabitat reported that Apple will crown its new Cupertino headquarters with a 5 megawatt solar roof, and we took a peek inside a sun-powered prefab pod home set in the Italian Alps. We also showcased several fresh examples of wintry architecture this week as we brought you six amazing buildings made from ice and snow and we learned that BIG's waste-to-energy ski slope incinerator was scrapped due to environmental concerns. We also showcased an innovative shelf for interiors made from movable pins, a set of awesome night lights made from retrofitted vintage cameras, and since the holidays are on the way we shared a kit that will help you make your own geodesic gingerbread house!

Speaking of the holiday season, this week we rounded up the world's 10 craziest Christmas trees made from recycled objects, and we brought you photos of a massive luminous Xmas tree in Lithuania made from 40,000 plastic bottles. We also brought you a guide for making your own DIY terrarium Christmas ornaments, and if you're looking for cool techy gifts to stick beneath the tree you won't want to miss Theo Jansen's 3d-printed miniature Strandbeest wind walking robots and this fun wooden iPhone toy for tots.

In other news, eco transportation blasted off to the future as Zapata Racing unveiled a set of insane water-propelled rocket boots that will send you soaring like a superhero and Audi and BIG unveiled plans for a network of driverless electric cars and luminous high-tech roadways. We were also excited to announce that the Nissan Leaf was named Japan's Car of the Year at the Tokyo Motor Show, we saw Daimler unveil plans for a new E-Cell hybrid with inductive charging, and Smart shared a sneak peek of their upcoming "For-US" compact electric pickup truck.