12/26/2013
Solar photovoltaic generation, known as PV also Solar Electricity.
Based on comparative life-cycle analyses of power sources, “PV electricity contributes 96 to 98 % less greenhouse gases than electricity generated from 100 percent coal
and 92 to 96 % less greenhouse gases than other fossil fuels for electricity mix.
Compared with electricity from coal, PV electricity over its lifetime uses 86 to 89 % less water, occupies or transforms over 80 % less land, presents approximately 95 % lower toxicity to humans, contributes 92 to 97 % less to acid rain, and 97 to 98 % less to marine eutrophication,” she said. Eutrophication is the process by which a body of water becomes enriched in dissolved nutrients (as phosphates) that stimulate the growth of aquatic plant life usually resulting in the depletion of dissolved oxygen.
Solar electricity generating capacity grew by a factor of over 21 between 2000 and 2012 and currently accounts for 0.3% of annual U.S. electricity generation.
In 2012, In the United States cumulative installed solar photovoltaic capacity grew more than 83% from the previous year
Toward the end of last year, installed global photovoltaic generating capacity passed the milestone of 100 gigawatts — enough to meet the energy needs of 30 million households and save more than 53 million tons of carbon dioxide emissions annually, according to a
recent report by the European Photovoltaic Industry Association, E.P.I.A., a solar power industry lobby group.
Going back 10 to 15 years, “we had to fight to find some crazy people who would install solar panels for $70 per watt on the rooftop, now it’s around $4.50 per watt USD,” said Eicke Weber, director of the Fraunhofer Institute for Solar Energy Systems, in Freiburg, Germany.