Retractable Leash Concept Uses Dog To Power Lights for Safe Walks

Images via Fido Fashion

After some debate on whether or not having a dog means a bigger carbon footprint than having an SUV, we're seeing our furry friends ramp up their contribution to the green movement. First, it was the solar powered dog sweater. Now, it's retractable leashes that store energy gathered from the coiling and uncoiling of the leash as your dog runs around. ...Read the full story on TreeHugger