Human fertility declines with higher population density • Wolfgang Lutz, International Institute for Applied Systems Analysis (IIASA) ; Maria Rita Testa, Vienna Institute of Demography ; Dustin Penn, Austrian Academy of Sciences

Mortality as a factor shaping household use of natural resources in rural South Africa • Lori M. Hunter, University of Colorado at Boulder ; Wayne Twine, University of the Witwatersrand ; Aaron Johnson, University of Colorado at Boulder

Integrating projections of households, energy use and carbon emissions for the United States • Michael Dalton, California State University, Monterey Bay ; Brian C. O'Neill, International Institute for Applied Systems Analysis (IIASA) ; Leiwen Jiang, Brown University ; John Pitkin, Analysis and Forecasting, Inc.

Mediating factors and deforestation in Brazilian Amazonia: a mixed-method analysis • John Sydenstricker-Neto, Cornell University