Inhabitat's Week in Green: self-driving tractors, U-CAT robot and the Interceptor police sedan

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. With Thanksgiving in the rearview mirror, it's time to start thinking about holiday decorations. London's Southbank Centre recently gave new meaning to the phrase "green energy" by unveiling a Christmas tree powered entirely by Brussels sprouts. And in Austria, a family claimed their second Guinness World Record by stringing over half a million LED Christm...