Desalination is all about cheap energy. Desalination plants produce fresh water at sea level, and that water has to be pumped to higher elevations where people

Desalination is all about cheap energy. Desalination plants produce fresh water at sea level, and that water has to be pumped to higher elevations where people live. It's a hidden, often overlooked, cost of desalination. That makes desalination most economical in flat, low-elevation costal regions.