The world will run out of fresh water long before it runs out of oil, with the potential for major deficits by 2030, the chairman of bottled water giant Nestle said. "We have a major water management crisis," Peter Brabeck-Letmathe told CNBC on the sidelines of the Credit Suisse Asian Investment Conference on Tuesday. "We are destroying 20 percent more water for human consumption than there is available." Around 1.2 billion people, or almost one-fifth of the world's population, live in areas of physical scarcity, and 500 million people are approaching this situation, according to data from the United Nations....