> , and for those really self-conscious about energy use, most of the heat to make that shower water warm was renewable. That's highly dependent on location an

> , and for those really self-conscious about energy use, most of the heat to make that shower water warm was renewable. That's highly dependent on location and time. And even if it's renewable, it isn't necessarily cheap, and the people in this article are mostly motivated by high energy prices, not renewability.