By the year 2040, the world's population is likely to increase by about 2 billion people, with also projected economic output will be up about 130 percent versus the year 2010. (Rex Tillerson)

By the year 2040, the world's population is likely to increase by about 2 billion people, with also projected economic output will be up about 130 percent versus the year 2010.

Rex Tillerson

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