Prof. Bruce Tonn provided the following abstract for his presentation: The U.S Census Bureau forecasts that the population of the United States will increase from approximately 280 million persons in 2000 to about 420 million persons
in the year 2050. The population several decades into the future will also be much older and about one-quarter Hispanic. Addressed by this paper are the potential impacts of these and other socio-economic trends on land use, energy, agriculture, water, and waste. In one worst-case scenario, environmental, financial and institutional problems coalesce, resulting in massive internal Diaspora of environmental refugees. Several interdependent, long-view, sustainability recommendations in the areas of energy and transportation, design of human settlements, and socio-economic policies are presented.