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This is an educational audio presentation by Dr. Patrick Nunn of the University of the South Pacific’s Geography Department. In it, he explains the fundamentals of the greenhouse effect—how greenhouse gases like CO₂ trap heat in Earth’s atmosphere—and outlines its critical role in moderating global temperatures. Dr. Nunn connects this science to the Pacific context, discussing the region’s vulnerability to rising temperatures, sea-level rise, and changing weather patterns. He emphasizes the importance of understanding the greenhouse effect for local climate adaptation strategies and policy planning across Pacific Island nations, drawing on research and climate modeling relevant to the South Pacific.

On low lying coral islands, potable water is commonly sourced from shallow, fresh groundwater lenses. Although rainwater is also collected in tanks in the wet periods, dependence on the lense for all water needs becomes critical in dry periods. Protecting the groundwater from pollution is a major concern. In the management of reticulated supplies private land is sometimes converted to a public reserve to restrict access and use in an attempt to ensure that groundwater is protected from surface contaminants. Usually this is achieved by a lease agreement between landholders and the government utility and this arrangement can be politically, socially and economically contentious. However in the village context where private wells are still used by landholders, control of pollution sources is more practically complex, while still raising many sociocultural considerations. This paper describes