Comments on: Urban Weather Stations, Bee Conservation and Green Roofs Global environmental challenges Wed, 16 Nov 2016 08:14:55 +0000 hourly 1 By: 12 Weeks Pregnant Thu, 16 Jul 2009 14:20:49 +0000 This is a great idea, I’ve been thinking about using my roof to grow organic vegetables, the only thing holding me back is fear of damaging the roof (water damage) or the risk of the roof collapsing by the extra weight.