Pittsburgh Adopts `Dark Sky,’ Dimming Lights So Stars Can Shine (1)

摘要

The world’s urbanization has made it increasingly difficult to see the stars in city skies, but that may be changing - at least in Pittsburgh.The Pennsylvania city announced in August it will become a dark sky citystarting in 2022, meaning that it will switch to lower wattage LED bulbs and add shades along bridges, roads and other public areas. It’s the first city in the eastern part of the U.S. to adoptsuch policies but it joins other cities, including Tucson, Sedona and Flagstaff in Arizona, and Fulda in Germany, in their efforts to reduce light pollution and increase energy efficiency.