Steffen is the founder of Worldchanging, a popular website on sustainability. Every day, Steffen and his team of journalists and practitioners deliver bright new ideas that The New York Times lauds as “solutions-focused reporting on innovation.” The ideas range from the small and clever to the huge and inspiring—and all are proof that the tools and models to build a better future are already here. Steffen brings them all together on the site, in his talks and in his edited book Worldchanging: A User’s Guide for the 21st Century (Abrams, 2006), a 600-page compendium of writings from more than 60 noted leaders around the world. Steffen’s next release, Bright Green, a book aimed at helping businesspeople understand where the big opportunities for change are, will be released in 2009. Steffen has been the subject of a CNN documentary, serves on the boards of numerous NGOs and is a much-sought-after speaker on the power of new thinking and innovative solutions for sustainable cities.