We tend to romanticize the glow that emanates from city lights. We don’t often realize that any light that goes into the sky represents wasted energy, about $2.2 billion per year according to one popular estimate. Not only does light pollution run up electric bills and create carbon emissions, it
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light
Streetlights do more than tell us when to be home — “Be back before they come on,” our parents would tell us – they also light the way and keep us safe. Nowhere is this more evident than in the sprawling camps of people displaced by the January 2010 earthquake in Haiti. In recent months, the lights