Clean water from power plant steam - Approximately 39% of all water drawn from US rivers, lakes and reservoirs is used to cool electric power plants, and ends up as steam. A new system created at MIT, however, could convert that steam into clean drinking water.

See the source article by following the link below:
Clean water from power plant steam - Approximately 39% of all water drawn from US rivers, lakes and reservoirs is used to cool electric power plants, and ends up as steam. A new system created at MIT, however, could convert that steam into clean drinking water.