Kansas City infoZine: Light colored roofs and pavements in cities around the world can not only help cities stay cooler, they can also cool the world, with the potential of canceling the heating effect of up to two years of worldwide carbon dioxide emissions. It’s not a new idea but now, a new study by researchers at Lawrence Berkeley National Laboratory is the first to use a global model to study the question. Because white roofs reflect far more of the sun’s heat than black ones, buildings with white …