Cities from Johannesburg to Los Angeles are changing street lights, insulating buildings and promoting bicycling to slash carbon emissions as envoys at United Nations talks bicker about binding greenhouse-gas goals.
“While national governments continue their excruciatingly frustrating dialog on climate change, we in the cities are acting,” Portland, Oregon Mayor Sam Adams said in an interview. “It’s sheer common sense. Becoming more efficient with your city’s energy needs means you’re also more economically secure.”
