The rural areas have a great need for basic facilities, and you have plenty of opportunities to show your social responsibility for improving local living conditions especially with schools, hygiene, energy, and education. The possibilities are unlimited and many of them can be realized with a small budget.
Some samples of ideas that can contribute to the welfare of the locals are: Build a classroom, repaint a classroom, build a school toilet, donate books for the school library, donate tablets or desktop PC for the school, help build small road bridges or an irrigation system, mini solar panel to produce electricity. The possibilities are unlimited depending on the available budget