by John Stossel Instead of using fossil fuels, we're told to use 'clean' energy: wind, solar or hydropower.Hydro is the most reliable. Unlike wind and sunlight, it flows steadily. But now, environmental groups want to destroy dams that create hydro power.'Breach those dams,' an activist shouts in my new video. 'Now is the time, our fish are on the line!'The activists have t...