A humorous guide to fertilizing your plants for free!Nitrogen pollution of lakes, rivers, and oceans by human urine is a growing problem. Liquid Gold shows how urine can safely be used to grow food, fuel, fiber, and beautiful landscapes while protecting the environment and providing free and safe fertilizer. Featuring a short history of urine use--from ritual to medicinal and even culinary--and many whimsical illustrations, this great bathroom reader is an ideal gift for irreverent gardeners, homeowners, campers, environmentalists, and anyone who urinates. Carol Steinfeld is a writer, urinal designer, and ecological wastewater consultant. Malcolm Wells is a well-known illustrator and author specializing in underground architecture.