New wind turbine installations make up nearly half of the total additional power-generating capacity, or 9.8 GW. Another 2.2 GW will come from solar power and 1.1 from additional nuclear capacity.
While the nation is increasing its share of power from renewable sources, it is also working to reduce dependence on some carbon-emitting fossil fuels. Of the 16 GW set to retire from the power grid in 2015, 81 percent is from coal-fired plants. Most of those retired generators are in Appalachian states like Ohio, West Virginia and Kentucky.
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The country's geography has a big influence on the renewable sources that crop up in different areas. Growth in wind-generated capacity is concentrated in the Plains states, with 8.4 GW, or 85 percent, going from the upper Midwest to Texas and New Mexico..
New utility solar installations are concentrated in North Carolina and scattered across sunny Southern California. The two combined will make up 1.6 GW of additional power, or 73 percent of solar additions.