If you like learning about potential environmental utopias, you should take a look at this Inhabitat post on The Logroño Montecorvo Eco City project in Rioja, Spain. The future project is "an ambitious carbon neutral development north of [Rioja's] capital city, Logroño. Designed by Dutch firm MVRDV and Spanish firm GRAS, the stunning development will feature enough photovoltaic cells and wind turbines to produce 100% of it's energy."We'd love to hear about city planning like this stateside.