Further Reading

Read more about the benefits of green roofs and living walls: http://www.greenroofs.org/index.php/about-green-roofs/green-roof-benefits

Calculate your water footprint: http://www.waterfootprint.org/?page=files/YourWaterFootprint

Discover the water footprint of various products: http://www.waterfootprint.org/?page=files/productgallery

Janet Raloff, “The Incredible Shrinking Solar Cell,” Science News, July 31, 2010.