Response to roof gardens piece

Heartening to see a news piece that encourages new business buildings to have plantable roofs. Imagine a time when many rooftops became gardens or meadows, especially on commercial and institutional buildings. The sprawling hospital complexes within most cities would be a good place to extend rooftop gardening to bring air-cleaning, relief, solace and perhaps even help in healing the stressed spirits of the ailing, their families and their medical professionals. We need to seek and welcome any thing we can do to increase the greenness of the earth we have assaulted so much with the environmental destruction labeled "progress."