Of the renewable energy sources, none of them generate greenhouse gases (except biofuel, which emits the same amount that it removed from the atmosphere while growing, so is carbon neutral). Of the fossil fuels (coal, oil and natural gas), the one that generates the least greenhouse gases is natural gas. read more
In 2016, the electricity sector was the second largest source of U.S. greenhouse gas emissions, accounting for about 28.4 percent of the U.S. total. Greenhouse gas emissions from electricity have decreased by about 1 percent since 1990 due to fuel switching to lower emitting sources of electricity production. read more
Sources of energy that do not produce significant greenhouse gas during generation include geothermal, wind, ocean energy, nuclear, hydroelectric, and solar. Nonetheless, except ocean, wind, and a special type of solar called photovoltaic, all of these “zero emission” sources require energy-dependent water to cool them or to run steam turbines. read more