America's Generation Capacity: 2017 is the Association's tenth annual report on current and forthcoming electricity generation capacity in America by types of fuel, location, and ownership type. Currently, America has just over 1.19 million megawatts of generation capacity. The largest fuel source is natural gas, accounting for over 43 percent of all generation capacity. Coal, with a share of just under 25 percent of capacity, is the second largest generation source. Nuclear, hydro, and wind together account for nearly 25 percent of capacity. Natural gas will continue to be the top fuel source in the near and distant future, followed by wind. A growing amount of generating capacity is expected to be fueled by solar.