Explore the complex relationship between population growth and environmental challenges in this 75-minute lecture from Yale University's "Global Problems of Population Growth" course. Examine world population projections through 2050 and analyze how increasing numbers impact consumption, conservation, and environmental footprints. Investigate the balance between environmentalism efforts and the strain of adding a billion people every dozen years. Delve into topics such as land and water scarcity, fertility decline, and contraceptive technology. Consider the potential for continued fertility reduction as a realistic approach to mitigating the global environmental crisis. Gain insights into the interplay of population dynamics, resource management, and environmental sustainability through this comprehensive exploration of demographic and ecological issues.