City growth worldwide intensifies sprawl concerns, study finds | green streets |

A new study, co-authored by Yale urban environment professor Karen C. Seto, predicts a major global expansion of urban land over the next two decades. The study, which was published in the Aug. 18 issue of the journal PLosOne, projects that by 2030, cities will gain an amount of land roughly equal to that of Mongolia. This extensive and rapid growth will pose significant challenges to urban environments, the researchers said.