use of rain roof at new school building. overflow from roof flows down pipe into barrel with hose to fill watering can

furniture lighting flooring hardwood carving machine ceramic table floor chair wheel shelf wood iron room drum art agriculture attic backyard barrel bathroom bathtub black building capacity cistern clean climate collecting container cottage drain ecological ecology economic environment equipment flowing garden gardening gathering growing gutter harvesting home industrial irrigation outdoor outdoors pipe pipeline plastic rain rainwater recycling reused roof savings storage store tank water water watering wood wooden