As recently as 2010, only 3 percent of Cambodia’s domestically generated electricity came from hydropower. By 2016, hydropower was the source of 60 percent of it. Completion of the Lower Sesan II dam in Stung Treng province will give hydropower yet another boost. At full capacity, the project is designed to generate 400 megawatts of electricity, making it the biggest hydropower station in the country. Our satellite captured these before and after natural-color images of the dam and reservoir. The first image was acquired on February 14, 2017; the second one shows the same area on February 1, 2018. The brown and light green areas in the first image, particularly those with straight edges, were likely cleared recently for timber; some of the smaller tan areas were crop fields near villages. Densely forested areas are green. In a country where only 50 percent of rural communities have access to the electrical grid, the boost in generating capacity will help with a government-led effort ...