The major opportunities include: Transportation. A significant shift to electric cars and trucks and continued fuel economy gains under new standards could approximately halve vehicle carbon emissions. Also reducing emissions: less driving in cars and light trucks, improved freight system efficiency, and more-efficient airplanes. Buildings. New homes and commercial buildings could cut their emissions by 70% with efficient design and use of cleaner electricity. Existing homes and buildings slash emissions with energy-efficient upgrades, smart control technologies, and electrification of heating and cooling. Adding to total emissions cuts are updated efficiency standards for appliances and equipment and growth in the ENERGY STAR® program. Industry. The industrial sector could deliver hefty emissions cuts with strategic energy management, smart manufacturing, industrial process improvements (including electrification strategies), changes in feedstocks and new process technologies and materials. ?Energy efficiency is indispensable to climate change mitigation,? says Kathleen Gaffney, co-author of the IEA?s Energy Efficiency 2018 report. ?It?s already made an immense difference. Without efficiency measures implemented since 2000, global emissions in 2017 would have been 12% higher.? Vignesh Gowrishankar, co-author of a related 2017 NRDC report, says energy efficiency is among the least expensive and most effective ways to reduce much of our emissions. ?It also improves the cost and effectiveness of other critical solutions such as renewables, electric vehicles, and electric heat pumps,? he adds. ?The good news is that we can start right now by investing more in energy-efficient appliances, buildings, vehicles, and industrial plants,? says Lowell Ungar, ACEEE senior policy advisor and report co-author. ?But to achieve maximum emissions reductions, we need political and financial investments that go far beyond business as usual. If we do so, the 2050 payoff will be impressive.? The report says government policies and programs alone would deliver about $700 billion a year in energy savings by 2050. Plus, the authors note, such investment will create more jobs, boost grid resilience, reduce air pollution, and improve people?s health. The US government, however, is moving to weaken efficiency standards for light bulbs, appliances and equipment, cars, and trucks. At the same time, more US cities and states are boosting their efficiency and clean energy efforts, though they still have a long way to go. The report calls for scaling up energy efficiency measures, including: Rapid upgrades to vehicle standards, building energy codes, equipment efficiency standards, ENERGY STAR specifications, and state energy-savings targets. Substantial improvements to existing factories, homes, commercial buildings, and the electric grid and better management of energy use in all of them, spurred by government investment and requirements. More travel options and better management of freight and aviation energy use, including through user fees. A switch to electric vehicles, equipment, and industrial processes (along with a more efficient and cleaner power sector). Greater investment in research and development for new efficiency options in every sector, especially improved industrial processes.
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