Fig. 2. United States (left) and Texas (right) electricity generation, in percent, by primary energy source for 2006 (Energy Information Administration 2008, Energy Information Administration 2009b). While nearly half of the electricity generated nationwide is from coal, nearly half of the electricity generated in Texas is from natural gas. Here, renewable includes traditional hydro power, solar, and wind power. (kWh: kilowatt-hours)

Fig. 2