Urbanization and Local Drivers of Emissions in the United States: A Nationwide Study of Declining Efficiencies of Scale • James R. Elliott, University of Oregon ; Matthew Clement, University of Oregon

Urbanization and Climate Change Hazards in Asia • Deborah L. Balk, CUNY Institute for Demographic Research (CIDR) ; Mark R. Montgomery, Population Council ; Zhen Liu, CUNY Institute for Demographic Research (CIDR)

Global Distribution and Risks of Exposures of World’s Cities to Natural Hazards, Air Pollution and Climate Change • Danan Gu, United Nations Population Division ; Patrick Gerland, United Nations Population Division ; Thomas Spoorenberg, United Nations Population Division ; Gerhard K. Heilig, United Nations Population Division

Impacts of Urbanization as a Key Element of Socioeconomic Scenarios for Climate Change Research: Historical Experiences and Future Trends • Leiwen Jiang, National Center for Atmospheric Research (NCAR) ; Brian C. O'Neill, National Center for Atmospheric Research (NCAR)