新的 daylight saving times WORKS !!

摘自 Popular Mechanics, March 2009

Since 2007, daylight savings times has started 3 weeks earlier and ended one week later each year, in a governmental bid to save energy. The first-year results are now in--and it worked. According to the DOE, the measure reduced U.S. energy consumption by 17 trillion BTU, enough to power 175,000 household for a year. Most savings resulted from slightly lower electricity use in the early evening. Southern states saw lesser savings, possibly because they were offset by more air-conditioner use.