Quartz Want to keep your house cool, save money, and help the environment? Consider a heat pump. To meet this goal, as many fossil fuel-powered activities as feasible must be converted to electricity, which must then be generated from low-carbon and carbon-free sources such as wind, solar, hydropower, and nuclear energy. Electric heat pumps, which are three to four times more efficient than furnaces, are an existing technology that can do this. The majority of heating systems in the United States employ forced-air furnaces that run on natural gas, electricity, or heating oil in some situations.
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