Tiptheplanet: More than 99% of the world’s available renewable energy is in one way or the other related to solar energy. The sun provides us with 174 petawatts (174,000 terawatts) of energy, of which half (89 petawatts) reaches the Earth surface. Since humanity consumes ‘only’ an estimated 15 Terawatts of power, we only need to convert a tiny fraction of this free solar energy (~0.00016%) in order to fulfill the energy needs of the global population.
“The depletion of ozone layer (a thin shield that envelopes the earth and filters and screens all harmful ultraviolet rays) has now stabilised, according to experts. In the path of recovery, it will take around fifty years for the ozone layer to go back to the stage it was in 1970s,” said Atul Bagai, senior regional coordinator, United Nations Environment Programme(UNEP).
He said the Chlorofluorocarbon (CFC) and other halogenated ozone depleting substances (ODS), mainly responsible for man-made chemical ozone depletion, were phased out in 2010. CFC was used in air conditioning, refrigeration, solvents, aerosol sprays, among others. The production and its use has stopped.