As our city grows, I believe (if it isn't already part of the requirements of new development), that new commercial construction must include at least 10% green-space. This is to prevent our city from becoming all brick, glass, concrete, parking garages, parking lots etc. It can be accomplished in the form of landscaping, wide areas of grass and trees. It cannot include INDOOR green-space. I'd also add that a good portion of that green space should be flowering plants. Not the non-flowering (low insect) crops you see popping up everywhere.
Or offer a tax incentive (break) to those developers that include at least 10% green-space in their construction.