Proponents of DST will tell you that it saves energy. This is because a study in the 1970s found a 1 % benefit to energy use. Energy consumption has changed now. New research shows no difference in energy use. A few studies suggest more energy is used. A 2008 study that looked at southern Indiana found DST increases electricity demand by $9 million a year. And then there's the physiological cost of DST: fatigue. The CDC regards insufficient sleep as a public health problem. The hour you lose in the spring makes it worse. About 60 % of Americans feel the effects of lost sleep the Monday after they spring forward, according to the Better Sleep Council. Several major disasters have also been caused by sleep deprivation, the Exxon Valdez oil spill, Chernobyl, and the explosion of Challenger.
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