We need to keep trees and natural areas lush and abundant - let nature take care of things how she needs to and we should stay out of the way. We need to sequester carbon and forests do that better than we do. I'm sure there are other ways to protect neighborhoods. Also - we should look at reuse of buildings that have lived past their usefulness such as the many big box stores going out of business. Maybe make luxury and affordable housing out of them...that way we aren't continually building on virgin land.