Amid a brutal drought the reservoir that supplies 90 per cent of Las Vegas's water is fast disappearing and desperate attempts to save Sin City are under way
Fresh water accounts for only 2.5% of Earth's water, yet it is vital for human civilization. What are our sources of fresh water? In the first of a two part series on fresh water, Christiana Z. Peppard breaks the numbers down and discusses who is using it and to what ends.