The findings show that for every m3 of rainwater used to wash clothes (the equivalent of 11 wash cycles) there is a saving of 5.68 Euros on detergent, and that large rainwater tanks for resident communities, or even for parts of neighbourhoods, is more economical and energy - efficient than individual installations. (sciencedaily.com)
The Guest House is powered totally by solar roof panels, with fresh water captured in two huge rainwater tanks beneath the house. (wikiaustralia.com)
According to a study released last week a third of the Melbourne suburban rainwater tanks studied had heavy lead levels, above the Australian drinking water guidelines. (treehugger.com)