With hundreds of entertaining facts, Thomas Kostigen gives simple tips for water saving, both the water you see and use and "virtual water," the water you cannot see but is embedded in the things you consume. For example, it takes 27 gallons of water to grow a banana but only 19 gallons of water to grow an apple--thus choosing to eat an apple can save 8 gallons of water. The Green Blue Book includes an extensive guide so you can make smarter choices and help reduce the demand for water-intensive foods and products. With breakthrough research, humor, and a hopeful message, The Green Blue Book will show how, drop by drop, one's water savings can add up.