The San Francisco Chronicle ran an interesting article on the trend toward "green building" yesterday.  Increasingly, cities are looking to require privately developed buildings to comply with a series of environment-friendly construction elements.  Pleasanton was one of the first cities to adopt such requirements, Boston and Washington D.C. recently joined the movement, and San Francisco is looking to do the same.  While green building may increase construction costs up to 2%, the savings from reduced energy and water needs, reduced waste and reduced maintenance could exceed this amount by 10 times over the life of the building.  Click here for the full article.