Last week, Bloomberg New Energy Finance (BNEF) and the Business Council for Sustainable Energy (BCSE) released their fourth annual “Sustainable Energy in America Factbook.” If there’s a new theme connecting the many energy facts in the 2016 edition, it’s “staying power.” According to Colleen Regan, Senior Analyst, BNEF, and co-author of the 158-page report, “Last year was certainly one for the history books: U.S. power sector carbon emissions fell to their lowest annual level since the mid-1990s. Perhaps most importantly, many of the key changes seen in 2015 are likely permanent shifts, rather than temporary adjustments due to one-time events.”