(The problems with nuclear energy is waste that remains dangerous for over 100,000 years, and that it is only profitable when it is subsidized by the government.)

A prominent Stanford University professor has outlined a roadmap for the United States to meet its total energy needs using 100% wind, water and solar by 2050.

Mark Jacobson, a Stanford professor of civil and environmental engineering and the director of its Atmosphere/Energy Program, has been promoting the idea of all renewable energy as the best way forward for more than a decade. His latest calculations toward this ambitious goal were recently published in the scientific journal Renewable Energy.