Chinese electronics giant Haier was showcasing its green credentials at IFA 2010 with this human powered washing machine. An exercise bike with a lithium-ion battery that collects energy as you pedal is hard wired to the front loading machine. When you pedal, you power the machine. Twenty minutes effort is said to give you one cold cycle wash without drawing power from the grid. It's an idea we've seen elsewhere in fledgling form – and its a good one. We'd love to see it get beyond prototype stage.