(Disclaimer: I stole the title of this post from the original article. Hey, if imitation is a sincere form of flattery...) Anyway, the Italian town of Torraca (population 1,200) is the first place on Earth to be entirely illuminated with light-emitting diodes (LEDs) instead of incandescent lighting. Lots of other cities around the world are following suit.

Though they're more expensive to buy up front, LEDs are much more energy efficient than old-school light bulbs, and they last a LOT longer.

"Potential energy savings, however, appear to hold more sway with cities and building owners than cost. After all, some 22 percent of all electricity use in the U.S. is devoted to lighting, according to the U.S. Department of Energy—and switching to LEDs could save $280 billion by 2028. In fact, researchers at the Rensselaer Polytechnic Institute in Troy, N.Y., estimate that replacing incandescents with LEDs could save $1.83 trillion in energy costs globally over the next decade and eliminate the need for 280 1,000-megawatt power plants."

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