Non-renewable resources are energy sources that we use and consume faster than nature produces them. Statistics are showing that if the current rate of consumption continues for oil, the supply is predicted to run out within the next 14 years. So a non-renewable source of energy is what planet earth needs. Researchers are employing a technique called Atmospheric Pressure Chemical Vapor Deposition to produce large-scale thin films which make up the perovskite call. To know more, please read the article by University of Salford -:   http://phys.org/news/2016-03-technology-harvesting-solar-energy.html