A [ new invention ]( http://www.theguardian.com/environment/2014/sep/28/solar-energy-sunflower-ibm-airlight-electricity ) uses 80% of incoming sunlight to generate electricity and desalinate water.
Ссылка: https://stallman.org/archives/2014-jul-oct.html#29_September_2014_%28New_solar_electricity_generators%29