I think the counter-spin turbine is really innovative idea. I wonder if it makes a big deal in terms of efficiency. http://youtu.be/zy4A-z2WKhw?t=7m3s http://y

I think the counter-spin turbine is really innovative idea. I wonder if it makes a big deal in terms of efficiency. http://youtu.be/zy4A-z2WKhw?t=7m3s http://youtu.be/zy4A-z2WKhw?t=7m3s