According to the renderings they are already planning to make the roof top a green space. What if they make it a vegetable, herb and fruit garden? Perhaps they could even include some beehives.
Perhaps this garden could be a partnership project with a local homeless shelter. Maybe we could pay some interested people at the shelters to tend the garden. The harvests could be donated to the shelter to help provide more nutritious food to the shelter. Or could be sold in a farmers market