With hundreds of entertaining facts, Thomas Kostigen gives simple tips for water saving, both the water you see and use and "virtual water, and " 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.