Will renewables replace conventional energy sources? Don't hold your breath

Coal, oil, natural gas will provide 79% of the energy in the U.S. in 2030, according to the Energy Information Administration. That would be a relatively small change from the 84% of U.S. energy these sources were responsible for in 2007. So as energy use climbs 0.4% annually over the next 20 years, renewable contribution of overall energy use will climb 0.2% annually despite years of government subsidies, state-level mandates, and the Green movements love of the technology.