The Environmental and Energy Study Institute (EESI) and E4TheFuture held a briefing on the growing number of Americans employed in the energy efficiency sector. The latest report from the nonprofit groups E4TheFuture and Environmental Entrepreneurs (E2) reveals a vibrant and growing part of the economy focused on helping homeowners and businesses make the most of their power supply. The briefing showcased the perspectives of industry analysts and insiders on why energy efficiency is one of the most dynamic parts of the U.S. economy today. Energy efficiency added more new jobs than any other industry in the entire U.S. energy sector in 2017, and now employs nearly 2.25 million Americans. As the fastest-growing part of the energy sector, efficiency now employs twice as many workers as all fossil fuel industries combined and accounts for 35 percent of all U.S. energy jobs overall. There are more energy efficiency workers than there are elementary and middle school teachers.