Much of today’s energy policy assumes that regulations mandating greater energy efficiency will reduce energy use. But that isn’t always the case, and energy efficiency improvements are seldom as large as promised by engineering calculations because of “rebounds.” Such is the most general conclusion from hundreds of studies pertaining to the effects of energy efficiency, whether market or nonmarket.
For example, people who install lighting that is 50 percent more efficient frequently leave the lights on longer, negating some of the energy savings from greater efficiency. This is called an energy efficiency rebound. Sometimes these mechanisms even bring about net increases in energy use known as backfires.
Rebounds have a direct implication for energy efficiency mandates and incentives.…
Whether it is a new fuel efficiency standard for cars, bans on incandescent light-bulbs, or those commercials touting businesses’ commitment to lowering their carbon footprint, the idea that we can reduce carbon emissions by using energy more efficiently is a mantra of our age.
In fact, energy efficiency is considered to be so important that it is sometimes said to be a “fifth fuel” along with coal, petroleum, nuclear, and “alternative” energy. And who can forget Amory Lovins’s term negawatt in this regard?
But as New Yorker staff writer David Owen details in his new book The Conundrum, the idea that we can reduce our energy use by buying the right products is based on flawed economic reasoning.
Improving efficiency and related conservation are not unique to energy but all resources.…