Two students at Taif University have invented a robot that improves the efficiency of solar panels by more than 14 percent by keeping them clean and dust free. : salma nouri : 2019-04-28T07:01:58Z dimanche, 28 avr. 2019 - 07:01 AM submitted by /u/green_flash [link] [comments] from World News http://bit.ly/2UK0cDS Facebook Twitter Google Plus World News Derniers articles