Inhabitat's Week in Green: algae-powered building, 3D-printing vending machine and the Toyota i-Road concept

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. Now that green design is entering the mainstream, we're beginning to see the design community tackle larger, more ambitious projects using eco-friendly techniques. Case in point: This week, San Francisco transformed the Bay Bridge into the world's largest light sculpture by outfitting it with 25,000 LED lights. Because the lights are so energy-efficient, i...