The graphic is based on the companies' Earthsense and Trucost scores. Earthsense asked 30,000 US consumers to rate companies' and products' greenness on a scale of 1 to 10 in a 2008 survey. A company's Trucost score is the estimated cost of its environmental impact under a "polluter pays" system, as a percentage of its annual revenue.
via www.newscientist.com(Click here to see an interactive graphics)