ScienceDaily: Changes in population, including aging and urbanization, could significantly affect global emissions of carbon dioxide over the next 40 years, according to a new study. The study, published in the Proceedings of the National Academy of Sciences (PNAS), was conducted by researchers from the National Center for Atmospheric Research (NCAR), the International Institute for Applied Systems Analysis (IIASA), and the National Oceanographic and Atmospheric Administration. It was funded by a …