New U.S. energy technologies made further advances and locked in long-term gains in 2015, according to a new study from Bloomberg New Energy Finance and the Business Council for Sustainable Energy. Among other achievements, energy efficiency continued to rise, renewable power generation set new records, and natural gas consumption and production surged as CO2 emissions fell to levels not seen since the 1990s, while power prices remained flat.

These and other trends are chronicled in the organizations’ fourth annual Sustainable Energy in America Factbook, a 150-slide almanac of key facts and figures on the evolution of the U.S. energy sector.

TheFactbook’s executive summary notes: “The already rapid de-carbonization of the U.S. power sector accelerated with record numbers of coal plant closures and solar photovoltaic system commissionings, while natural gas production and consumption hit an all-time high. Concurrently, the U.S. continued to enjoy