This is a massive assertion on your part, and the quality of "green"space can vary widley in urban areas. Yards without rooty vegetation are safer for houses, t

This is a massive assertion on your part, and the quality of "green"space can vary widley in urban areas. Yards without rooty vegetation are safer for houses, they're good for warehousing children, they're nice to relax on in a private/semi-private setting, you can drink on your lawn, etc.