Hubby's on You Tube. Talking about the UCSF eucalyptus trees

See the You Tube video on the UCSF Eucalyptus management plan, featuring my hubby, consulting arborist extraordinaire, Ray Moritz. http://www.youtube.com/watch?v=KCUV8a22_QE&feature=search

What is "Green" Development?

Is there such a thing? Can you have a development that's truly green, and not primarily for the developer? Is it a non-profit project, or any old building that saves some open space, uses so-called green building materials and solar panels?

How about sustainable? What is that in the development context? Your answers awaited here.