Patriot Ledger: As political leaders strive to make the region more energy-independent in 2010, there’s no question solar panels and wind turbines will be part of their vision. But the role that wood-fueled power plants can play is increasingly becoming a topic for heated debate. The state Department of Energy Resources informed biomass plant developers a month ago that it would delay certifying those projects as renewable energy sources for up to a year. The agency had just hired the Plymouth-based …