i'm not saying i always use unbleached paper in my house.re not trying to say you have to live up to somebody else's expectations or standards. this is simply an attempt to help you understand what the current thinking about green building is, and how you might choose to incorporate some of those things in your house. one of the big -- the big issues we're all confronting is energy. why are we confronting energy as a topic for green buildings? >> why? because it's a resource that is running scarce oon us. and because in san francisco we've got a big issue with the bayview hunters point plant. we're trying to promote energy efficiency and conservation. two different things. >> what is the difference? >> energy efficiency and energyconservation would be to turn off lights and be efficient, or to use more efficient appliances in your home. if you buy a new refrigerator that is more energy efficient, it doesn't take as much energy to run that appliance. >> lighting and lighting controls, if you have the obvious issues with regard to lighting, ho