A friend sent me a link a few weeks ago (thanks Suzy!) about Christmas trees in Barcelona that are powered by bike (click here to read the story). A series of bikes are attached to generators and passersby are encouraged to take a spin for a minute or two to keep the trees lit…pretty cool. There’s a similar set up in (not surprising and very timely) Copenhagen (click here). Too bad the States doesn’t take a similar approach with the tree at Rockefeller Center.