Yet the study of six different manufacturers» products found the green roofs varied greatly in capabilities such as how much they cooled down a building's interior and how much rainwater they captured during downpours. (phys.org)
You are supposed to meet water needs from rainwater capture, but that's not allowed for health reasons, so the building is being connected to the City water supply until it can prove that its collected water is safe. (treehugger.com)
Also, they say, in severe droughts, rainwater capture allows property owners to keep gardens or water lawns, and it helps free up more water for drinking. (mercurynews.com)