What do dieting and energy policy have in common? The SnackWell effect. The name comes from those tasty little cookies that are 1as being lower in fat and sugar. But they often lead dieters to eat more of them than 2cookies and then wonder why they're not losing weight. It turns out there's a SnackWell effect for energy use too—and it may make it tougher for us to cut back on carbon. When 3conscious consumers buy an energy-efficient dishwasher, for example, they may feel less guilty about 4the machine more often and as a result may not end up saving much on their utility bills. Likewise, studies indicate that people who 5more-energy-efficient lights lose 5% to 12% of the expected savings by leaving them on longer. Much like dieters eating too many SnackWell's, we can fail in our attempts to save energy and money. So resist the 6to raise your thermostat (恒温器) after you buy a more efficient furnace: lower the temperature by a degree and shave another 1% off your heating bill. But even if we do what Jimmy Carter did and wear a 70s-style sweater all winter, we may end up spending those energy savings somewhere else—like on a plane 7to Bermuda A report estimated that 8, this effect could reduce the savings from energy efficiency by 10% or more. That doesn't mean energy-efficiency measures are 9—or that we should never go on vacation. But it does mean that cutting back on energy 10, like dieting, is not an excuse to stuff ourselves on less guilty pleasures.A) acting E) globally I) ride M) specialB) advertised F) install J) route N) urgeC) consumption G) operated K) running O) uselessD) environmentally H) regular L) saving