A lot of folks do not realize refinery's make an excess of power, as did US Steel, Gary Works did when I worked there as a Boilermaker apprentice and journeyman in the '70s. I have rehabbed (rebladed) turbines as old as built in the 20s, still making power. It has been a trend for some time now for industry to not let heat (energy) go to waste. The refinery at Anacortes, Wa has more turbines than I have fingers and toes. Here's one for the Green movement, in Cal. North of Napa, SW of Clear Lake, there was a small mountain area that had 14 Geo Thermal turbine stations making cheap power, but a small amount of naturally occurring Arsenic coincided with the steam. Even though the Arsenic was totally contained, the Greeners took 'em to court and shut the whole thing down. Hooray for them. Too bad for for us. Let's put some propellers on poles.