ClimateWire: The U.S. solar and wind power industries will mark the holidays with heightened spirits after receiving multiyear extensions of their coveted renewable energy tax credits from a divided Congress. On Friday, the House and Senate agreed by significant margins to grant extensions to the 30 percent investment tax credit (ITC) for solar energy and the 2.3-cent-per-kilowatt-hour production tax credit (PTC) for wind power. Other technologies -- including geothermal, marine energy and small hydropower...