Desalination: option or distraction for a thirsty world?

Making drinking water out of sea water is a growing trend in some of the world's driest and thirstiest places, including Australia. But it's also a potentially dangerous threat to the environment that could lead to a build up of brine, increased greenhouse gas emissions, the destruction of prized coastal areas, and reduced emphasis on conservation of rivers and wetlands, according to a new global report by WWF.