As international leaders gather next week to discuss climate action during Climate Week NYC, a new report claims that energy efficiency can slash US energy use and greenhouse gas emissions by 50 percent by 2050 and get the United States halfway toward its climate goals.
The report, by the nonprofit American Council for an Energy-Efficient Economy, offers a road map for dramatically reducing energy waste. It identifies measures that would avert emissions of nearly 2,500 million metric tons of heat-trapping carbon dioxide — equivalent to all emissions from cars, trucks, homes, and commercial buildings in 2050.
“Energy efficiency is an urgently needed climate solution,” said ACEEE executive director Steven Nadel, a report co-author. “It can deliver swift, robust emissions cuts. We cannot wait to take action. We already see the effects of intensifying climate change and the resulting increase in extreme weather events — from respiratory and other health problems to flooding, drought, heat waves, and wildfires.”
To avoid a climate change catastrophe, long-term strategies have called for reducing total US greenhouse gas emissions by 80–100 percent by 2050. Prior studies, including by the International Energy Agency (IEA) and the Natural Resources Defense Council (NRDC) found that efficiency measures can produce nearly half of these reductions.
The ACEEE report, Halfway There: Energy Efficiency Can Cut Energy Use and Greenhouse Gas Emissions in Half by 2050, builds on this work by identifying 11 opportunities and related policies to achieve the necessary savings. Transportation, which will see a transition to electric vehicles, would deliver nearly half (46 percent) of the emissions reductions while buildings would deliver a third and industry a fifth. For energy savings, buildings would deliver 40 percent of the total, followed by transportation (32 percent) and industry (27 percent).
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.
According to the report government policies and programs alone would deliver about $700 billion a year in energy savings by 2050. Plus, the authors note, such investment could create more jobs, boost grid resilience, reduce air pollution, and improve people’s health.
I replaced my 1972 air conditioner with a 10 SEER unit in 1995. The new unit used only about 40% of the power required by the older unit. Now a 14 SEER unit would use 40% less, while a 16 SEER unit would use 60% less than the 10 SEER unit. In my current home, I have a 14 SEER heat pump, while I installed 16 SEER heat pump and air conditioner for friends. If everyone switched from wall mounted air conditioners, or 1980 and earlier air conditioners to something with 16 SEER or higher, they would save a lot of energy, thus less emissions, less need to build more power plants! Of course switching to LED lamps reduce power right now! Encourage wind turbines in your neighborhood too!