APES- Chapter 1 Chapter Summary Key Theories in Environmental Sciences Case Study: Shrimp, Mangroves, and Pickup Trucks ? This case study highlights the plight of a small farmer in Thailand in the shrimp farming business. He makes his living by carving out small ponds among the mangrove forests, destroying a habitat valuable for its support of coastal fisheries in the process. The small farms are not managed in a sustainable manner and when the water in the pond is so polluted with waste that it is no longer productive the farmer has to move on and carve out new ponds. One half of the world?s mangroves have been destroyed. This chapter discusses the connections between people and nature, emphasizes the global scope of environmental problems, the