Fact Sheet: Renewable Energy and Energy Efficiency Jobs  , released in November  2015 by the Environmental and Energy Study Institute (EESI),   is described as “a best effort to survey the status of renewable energy and energy efficiency jobs from the data that is publicly available.” The employment statistics are sourced from the U.S. Department of Energy (DOE), as well as international organizations, national non-profits, think tanks and national trade associations . Most of the international statistics are taken from the IRENA Renewable Energy and Jobs Annual Review 2015 , which estimates that there are 7.7 million jobs worldwide in renewable energy employment. The EESI acknowledges that the statistics are not directly comparable because of the different definitions and methodologies of the sources, and further acknowledges that some statistics are dated because of a lack of more current information.