During the 2013 Bank of America/Merrill-Lynch Power and Gas Leaders Conference in New York last week, executives from Akron-based FirstEnergy and NextEra Energy Resources disputed the "extent of renewables penetration into the U.S. power supply," Platts reports. FirstEnergy, which led the industry charge against Ohio's renewable energy and energy efficiency laws, said that the world cannot survive on green energy alone and that "the more renewables you have the more reserve margin you need." Meanwhile, NextEra, which "bills itself as a 'clean energy' company and the largest wind and solar generator in North America," maintained that renewables are an energy resource and "the utility industry needs to get its head around a paradigm where you're going to have some intermittent supply and some intermittent demands," the article said. For more, read the full story.