A boy holds up a tiny carpenter fish in the village of Kyehoro on Lake Albert in Uganda. Though huge, the lake is severely over-fished. Nile perch are now too small and too few to sustain the human population, so locals have taken to using mosquito nets stitched together to get their food. With mesh that small, no fish can escape. “Any aquatic organism that falls in the net is killed,” says a local guide. Residents of the area get 80% of their food and fish from the lake, which means serious trouble when the fish run out.