How soon can we use the oceans to quench the world's thirst?

Which each passing year, the world gets thirstier. As the human population continues to grow, and becomes more urbanized, our sources of drinkable water get pushed to their limits. The solution? Desalination — the process of removing salt from ocean water. But given the tremendous costs and energy requirements of… » 8/24/12 11:30am 8/24/12 11:30am

The best solution to world thirst may be desalination

Water may be flowing on Mars, but where we really need it is here on Earth. Over 75% of our planet's surface is covered in water, yet 2 billion people worldwide reside in water-stressed countries. With fresh water accounting for a meager 3% of Earth's total water supply (and the vast majority of it locked up in… » 8/04/11 6:28pm 8/04/11 6:28pm