Inhabitat's Week in Green: cow treadmills, electric cars, and the Milan Furniture Fair

It was a busy week in green design as the design world's most important trade show, the Milan Furniture Fair, wrapped up, and Earth Day hit with full force on Thursday, April 22nd. Inhabitat brought you the most incredible green designs from Milan -- from LED lamps made almost entirely from soap to Inigo Mauerer's stunning new stripped-down OLED chandelier to gigantic architectural LEGO bricks (with life-size lego furniture to match!)

We also caught wind of several curious new energy developments from across the pond -- first, the UK is hatching a plan to recycle human waste into fuel by piping biomethane from the sewage system back into homes in Oxfordshire. Meanwhile a farmer in Norther Ireland has created a treadmill for cows that he thinks could generate 6% of the world's power. More conventional alt energy sources are on the rise as well - this week researchers announced advances in dye solar cells that make strides towards grid parity and a gasification process that is capable of doubling biofuel production.

Several major auto manufacturers also got our engines racing this week as they unveiled the next generation of sleek electric rides. Toyota officially revealed plans for a minivan sequel to it's ever-popular Prius while Chevy charged ahead with the MPV5, a larger version of the Volt sedan that seats five and packs extra space in the trunk. And finally, if classic cars are more your style, don't miss this cloth-covered retrofit to a rusty old MG Midget.