Technological breakthroughs have sharply cut the cost of producing electricity from solar energy since the 1980s, with interest in the clean power source rising in the midst of a spike in fossil fuel costs and worries over climate change.
"In the last 20 years, the cost of solar has come down almost 90%. That is occurring due to improvements in technology and scale of manufacturing," Rhone Resch, president of the Solar Energy Industries Association, told Reuters during an industry conference this week.
