Besides hydro, isn it possible to expand electricity generation capacity without increasing CO 2 by installing additional nuclear power or using renewable fuels, such as wind, solar, or geothermal?
Nuclear power capacity is diminishing in North America as existing facilities reach the end of their useful life, and that capacity will likely be replaced with fossil fuel. New nuclear capacity is unlikely within the time frame under consideration because of high costs, environmental issues, and public opposition. Similarly, power generation from renewables is not expected to be cost-competitive in any significant capacity in the foreseeable future and has other physical and geographical limitations.