Some people call it “renewable energy” but I prefer to call it “alternative energy” because that’s what it really is: an alternativeto energy that actually works (eg nuclear and anything made from wonderful, energy-rich fossil fuel.)
Now a pair of top boffins from uber-green Google’s research department have reached the same conclusion.
Ross Konigstein and David Fork, both Stanford PhDs (aerospace engineering; applied physics) were employed on a Google research project which sought to enhance renewable technology to the point where it could produce energy more cheaply than coal. But after four years, the project was closed down. In this post at IEEE Spectrum they tell us why.