Prof. Paolo Dario and a team of researchers assembled this recycle-bot to clean up after litterbugs by collecting trash from people's doorsteps. The Segway-based DustCart runs on a three-level intelligence system that allows it to navigate by interacting with wireless networks, which helps determine routes and communicate info with the mobile waste disposal. That’s just the tip of the garbage lid: It also comes equipped with special sensors that determine air pollutants in real time. Go Green.