Newer types of artificial turf can provide great insulation qualities, support high traffic, and allow easier drainage.

There’s a lot of “energy” (maintenance & water) spent on maintaining grass on the roof of a building, and it’s difficult to ensure sufficient drainage, or trace leaks / water intrusion.

The ideal “green” roof is a recycled plastic roof that can support outdoor gatherings (allowing for building occupants to get fresh air and sunlight) ,while providing enhanced building efficiency while also drawing less water and energy, all paired with real potted plants that support birds and pollinators.