Mr. Reuss: [Is it not a fact that] by and large the phosphate which shows up at sewage disposal plants comes from two main sources - household detergents and human waste?Mr. Klein: Yes, sir.Mr. Reuss: And household detergents are made by three major manufacturers?Mr. Klein: That is correct.Mr. Reuss: And human wastes are made by a couple hundred million manufacturers; is that correct?Mr. Klein: Yes, sir.Mr. Reuss: Well, doesn't it occur to you that it is easier to do something about three than about a couple hundred million?