The Ecotopia 2121 Project details the futures of 100 cities across the globe as though they've somehow overcome all environmental problems and grown to become super-ecofriendly. This week we highlight the future of Graz; the principal city of the Austrian state of Styria. Graz nowadays is a Clean-Tech hub in Europe; a sector that includes renewable energy, recycling technology, and zero-waste production. The sector earns hundreds of millions of dollars per year for the city a