PPL Generation, a subsidiary of PPL Corporation, operates more than 40 power plants in northeastern and northwestern portions of the US. Not a discriminating power producer, PPL Generation utilizes a variety of fuels at its plants, including coal, natural gas, oil, uranium, water, and renewables (biogas, solar and wind). PPL controls or owns nearly 12,000 megawatts of generating capacity in the United States, sells energy in key U.S. markets, and delivers electricity to about 4 million customers in Pennsylvania and the United Kingdom. PPL Generation output is marketed to wholesale customers by affiliate PPL EnergyPlus.