"This Thing Called Water" - Listen to this compelling speech by Bill Bertera, Executive Director of the Water Environment Federation (WEF). Speaking in New Orleans still rebuilding from the ravages of Hurricane Katrina, Mr. Bertera talks about how important water is to us every day. Our need to have access to fresh, clean, untainted sources of water. How water or the lack of it affects every human being and organism on the planet. Learn about how much water there is on Earth and how much water we actually use. A truly enlightening talk that will open your eyes to the global need to manage this incredible resource called water.