The document discusses integrated area development (IAD) as an environmental planning strategy used in the Philippines from the 1970s to 1986. IAD projects aimed to revitalize economically depressed areas through an integrated approach providing infrastructure and services. Major IAD projects included those in Bicol, Mindoro, Cagayan, Samar, Palawan, and Bohol. IAD distinguished itself from prior rural development through its defined geographic scope, multi-sectoral coordination, and focus on linking rural and urban areas to boost development. However, challenges included difficulties integrating diverse agency plans and gaining grassroots participation.