[iframe src=”http://player.vimeo.com/video/25353113?title=0&byline=0&portrait=0″ width=”681″ height=”383″ frameborder=”0″] Knowledge is power, and Graham Hill channels knowledge into inspiration and action through the green news site TreeHugger.com. As a serial “designpreneur,” Graham shares about the challenges of entrepreneurship, and how to make a difference through your work.