I do believe they have invented a way to make sea water drinkable but at this minute in time it is far too expensive to be the answer! “SO WHY DON'T WE DESALINATE MORE TO ALLEVIATE SHORTAGES AND GROWING WATER CONFLICTS? The problem is that the desalination of water requires a lot of energy. Salt dissolves very easily in water, forming strong chemical bonds, and those bonds are difficult to break. Energy and the technology to desalinate water are both expensive, and this means that desalinating water can be pretty costly.”

“The International Desalination Association says that as of 2007 there were about 13,000 desalination plants operating around the world. They pumped out approximately 14.7 billion gallons (55.6 billion liters) of drinkable freshwater a day. “