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the U.S. Nuclear Regulatory Commission; and the U.S. Environmental Protection Agency (EPA). NEER NEER is a wholesale generator of electric power in the U.S., with approximately 18,122 mw of generating capacity across 24 states and 4 Canadian provinces as of December 31, 2012. NEER produces the majority of its electricity from clean and renewable sources, including wind and solar. NEER also provides full energy and capacity requirements services, engages in power and gas marketing and trading activities, participates in natural gas production and pipeline infrastructure development and owns a retail electricity provider. Through its subsidiaries, NEER owns, develops, constructs, manages and operates electric generating facilities in wholesale energy markets primarily in the U.S., as well as in Canada and Spain. NEER is the owner of wind and utility-scale solar energy projects in North America. NEER provides full energy and capacity requirements services primarily to distribution utilities in certain markets and offering customized power and gas and related risk management services to wholesale customers. NEER also participates in natural gas production through non-operating ownership interests and pipeline infrastructure development, hereafter referred to as the gas infrastructure business, and owns a retail electricity provider serving customers in 13 states and the District of Columbia. Contracted Assets: As of December 31, 2012, NEER had 11,039 mw of contracted assets. Merchant Assets: As of December 31, 2012, NEER's portfolio of merchant assets consists of 7,083 mw of owned wind, nuclear, natural gas, oil, solar and hydro generating facilities, including 846 mw of peak generating facilities. Other: NEER's operations also include the gas infrastructure business and the customer supply and proprietary power and gas trading businesses. As of December 31, 2012, the gas infrastructure business had non-operating investments located in shale formations primarily in Texas, Oklahoma, Wyoming, North Dakota, and Louisiana. NEER Fuel/Technology Mix Wind Facilities As of December 31, 2012, NEER had ownership interests in wind generating facilities with a total capacity of 10,057 mw (net ownership). NEER operates all of these wind facilities, which are located in 19 states and Canada. During 2012, NEER added approximately 1,520 mw of new wind generation and sold a wind facility with 30 mw of generating capacity. Natural Gas Facilities As of December 31, 2012, NEER had 3,991 mw of natural gas assets. NEER owns and operates 1,004 mw of natural gas-fired generation from contracted assets located throughout the Northeast. Nuclear Facilities At December 31, 2012, NEER owned, or had undivided interests in, and operated the following 4 nuclear units with a total net generating capacity of 2,721 mw. Solar Facilities NEER is an owner of utility-scale solar energy projects in North America, principally through a 310 mw facility in California's Mojave Desert, of which 148 mw is owned by NEER as of December 31, 2012. NEER and its affiliates are in the process of constructing solar thermal facilities with generating capacity of 99.8 mw in Spain (Spain solar projects) and 250 mw in California (Genesis solar project), which are expected to be completed in 2013 and 2014, respectively. In addition, a 550 mw solar PV project in California (Desert Sunlight solar project), in which NEER has a 50% equity investment, has commenced construction and commercial operation is expected to be phased in during 2013 through 2015. During 2012, NEER acquired 40 mw of new solar generation in Canada. Other Assets As of December 31, 2012, NEER had 1,155 mw of generation assets from various other fuel technologies, including oil and hydropower, with facilities located throughout the Northeast. In 2012, a subsidiary of NEER entered into an agreement to sell its ownership interest in a portfolio of hydropower generation plants and related assets with a total generating capacity of 351 mw located in Maine and New Hampshire. NEER Customer Supply and Proprietary Power and Gas Trading NextEra Energy Power Marketing,