The economic and environmental need to transition to a low-carbon economy is now at the forefront of energy science, engineering, and policy discussions in the U.S. and internationally.  Former Vice President Gore has called for a 100% decarbonization over 10 years and California, Japan, and the UK are notable for a growing list of municipalities legislating 70% or more decarbonization goals over the next four to five decades.  Thus far much of the effort has been focused on technology and policy solutions, with very little attention given to how this change can be enabled through financing.