Quartz: Cities--the best of which are bastions of transit networks, bike paths, compact apartments and chirpy baristas--are growing faster than litters of sewer rats, exacerbating their already-high hungers for energy. The trend is so steep that a new analysis projects that urban centers will be burning through three times more energy in the year 2050 than was the case in 2005.
But what sounds like a threat could also be viewed as an opportunity. The new study, by five European and American researchers...