Overarching themes to be considered in this volume include: taking action in the face of uncertainty (mitigating climate change impacts, adapting to climate change, protecting coastal ecosystems, protecting wetlands and estuaries, preserving forest resources, protecting critical aquifers, preventing the spread of invasive species, and identifying and conserving vital global habitats); promoting international cooperation in the face of conflicting agendas (designing and implementing climate change policy, reconciling species protection and free trade, allocating scarce resources, designing sustainable fisheries, addressing global overpopulation, preventing trade in endangered species, conserving global biodiversity, and mitigating ocean debris and pollution); addressing conflicts between economic progress and environmental protection (preserving open space, redesigning cities, promoting ecotourism, redeveloping brownfields, designing transit-oriented development, confronting impacts of factory farming, preventing non-point source agricultural pollution, confronting agricultural water use, addressing the impacts of agrochemicals, designing sustainable food systems, and valuing ecosystem services); addressing complex management challenges (energy efficiency, solar energy, wind energy, hydrogen economy, alternative vehicles, solid waste disposal, hazardous waste disposal, electronic waste disposal, life cycle analysis, and waste to energy); and addressing disproportionate impacts on the poor and the weak (preventing export of developed world waste to developing countries, minimizing co-location of poverty and polluting industries, protecting the rights of indigenous peoples, preventing environmental disease, protecting children’s health, providing universal access to potable water, and protecting environmental refugees). The final three chapters will examine next generation environmental leaders.