. >> host: i remember reading there is a volkeswagon plant in tennessee that has the solar ray. it produces about 12.5% of the energy that is necessary. there are times when it makes sense and doesn't. one problem, i think, with these programs is that they do their creation of political incentives and keep us from concerns. there is concerns about fracking and it is good we talk about those and deal with the problems. but there are enormous environmental problems associates with ethanol with the way the corn crops affect the farmers and the shortage of water is a real issue and ethanol plants take tremendous amounts of water. but you never hear of one balancing the other. solar power production has to use a lot of highly toxic chemicals to make it work. as we are getting close to winding up here, i have enjoyed these specific historical examples, but in the middle of the 20th century we get the great australian economist talking about the social calculation program and he argues in experiences that confirm is in the absence of marks there is no way to make an intelligence decisi