Unfortunately it seems to be more politically rational to invest in existing inefficient green technology than R&D (see: Solyndra). Fossil fuels can last a ver

Unfortunately it seems to be more politically rational to invest in existing inefficient green technology than R&D (see: Solyndra). Fossil fuels can last a very long time. America's largest shale oil reserve isn't in North Dakota, it's in California in the Monterey Shale formation, currently unexploited.