Bill Gates is investing part of his time and money in finding the alternative energy sources. Water is an essential natural resource which is not available everywhere. Recently, Bill Gates recently got to check out the Omniprocessor, an ingenious machine designed and built by Janicki Bioenergy, which turns human waste into water and electricity. In places without good waste treatment plants, it could be a real game-changer, said Bill Gates. To prove his point, he drank a glass of water made from human waster. Yes, the richest man in the US did it.