February 18, 2009 lecture by Brent Constanz for the Woods Energy Seminar (ENERGY301). In his talk "A Pathway for Widespread Utilization of Geothermal Energy--the Roles of Multi-scale Resource and Technology Research and Systems Analysis," Brent Constanz states that concrete is the most used product worldwide next to water and he suggests that we could safely, cheaply, and quickly store carbon dioxide in concrete at the rate of about six billion yards per year.