Mangroves may appear to be nothing more than the coastal cousins of interior forests, yet these diverse ecosystems sustain the earth and people in special ways, such as by acting as fish spawning grounds, carbon sinks, and flood protection. Nevertheless, mangrove forests are in danger despite how important they are. More than a quarter have already vanished, and a large portion of that clearing is being done to reclaim land for infrastructure, industrial expansion, and agricultural usage. There are local hazards as well as global concerns like pollution and climate change. These include overharvesting of wood for building and construction as well as for fuel, dams, and irrigation systems that decrease the quantity of water that reaches the woods, and, overfishing that disturbs fish ecosystems and food chains.