For years we have heard people say that they wanted to build a better mousetrap, but what about a better toilet? It is estimated that 2.6 billion people in the world do not have a proper toilet. And the majority of the developing world does not have a flush toilet.  Billionaire Bill gates wants to change that situation. The Bill and Melinda Gates Foundation is putting their money where their mouth is with $42 million in potty grants. They want to improve the capture and storage of human waste and perhaps develop it as another type of energy source or fertilizer. has more on Bill Gates desires to reinvent the toilet.