Cities are facing climate change. Urban areas are warming up. Storm water overflow is contaminating beaches, bays, rivers and lakes. Development continues to encroach on the natural environment. Green roofs (or “eco-roofs”) provide a simple, practical solution to all these problems. Green roofs are an engineered, lightweight roofing system that supports plants. Green roof technology has been popular in Europe for 30 years, and is used in some North American cities including New York, Chicago, Toronto, and Portland, Oregon. But green roof technology is not well known in most of the United States and hardly at all in San Diego. Read more: http://voiceofsandiego.org/2007/12/11/a-simple-practical-solution/