About 4 billion people face severe water shortages during at least one month every year, far more than was previously thought, according to new research. Half of the 4 billion people who experience conditions of severe water scarcity at least one month of the year live in either China or India. Of the remaining 2 billion, the majority live mostly in Bangladesh, Pakistan, Nigeria, Mexico and the western and southern parts of the United States, such as California, Texas and Florida.
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