Energy efficiency employed nearly 2.4 million Americans in 2019, by far the most in the U.S. clean economy. This fourth annual publication begins with an 11-page national summary of the 2019-20 efficiency jobs landscape including the pandemic’s impact. State specifics fill out the full report’s 430 pages with meaningful comparisons such as sectors, technologies, firm size and more. Job numbers are detailed for metro, county, legislative and congressional districts.