By 2025, the United Nations reports, two out of three people on Earth will live in places without enough freshwater to drink or grow crops. One way to beat that trend is to extract water from saltwater. The most common method of doing that is reverse osmosis, an energy-intensive process. To reduce that energy burden, researchers are developing other methods to desalinate water, such as using biomimetic membranes. Some proposed desalination plants will reduce their energy needs by using energy-capture schemes or sustainable energy sources like wind power.