MIT researchers have found a new method that uses solar power to remove salt from water.
The water is one of the most important elements in the "Blue" planet but for human food purposes it is necessary to remove the salt.
Sources:
MIT Invention Turns Salt Water Into Drinking Water Using Solar Power | Popular ScienceSecuring Water for Food: A Grand Challenge for Development Announces Winners of the Desal Prize | Press Release | U.S. Agency for International Development