I served in the Philippines from 1987-1989 where I lived in a small town in the north of the country, and had my own bamboo hut on the Lingayen Gulf. My field was Marine Fisheries and my project was building artificial reefs out of old tires.
The natural coral reefs had been dying off for several reasons, including dynamite fishing. The artificial reefs were intended to provide habitat for reef animals and plants. My Filipino coworker would arrange to obtain the materials (including BUYING the old rubber tires), and we would travel out to small villages and work alongside the villagers to construct the tire reef modules and cement weights. Then the men would take the completed modules out to the chosen site on a bamboo raft and push them off into the water. I really enjoyed meeting and working with the subsistence fishermen and their families, and seeing how they lived. The Filipino people are very kind and friendly.