The world is running increasingly short of freshwater. It is estimated that nearly 2/3rds of the entire world will be water scarce by the year 2030. Because 97.25% of the world's water is in its oceans and most of the rest is in ice caps, only 0.01% of all the water in the world is accessible without seawater desalination. Currently though desalination is very energy intensive and is therefore a greenhouse gas emitter. A 500kL/day desalination plant operating on Australia's eastern seaboard emits the equivalent of nearly 1,000,000 tonnes of CO2 per year or an extra 220,000 cars on the road every year (*).
Glodal Water Scarcity - 2030. The yellow and red areas represent 62% of world population.
fonte: UN (Nacoes Unidas)