1.A increased by one billion ( thông tin trong bài : With an increase of a billion people over only the past fifteen years )
2.C 45% more resources ( forty-five percent will need more energy )
3. A and C 50% ( by 2030 half the world will require more food than they have available )
4.D Two-thirds of the world population may suffer from a shortage of water.  ( Some two out of three people living on the globe may have problems getting access to enough water. )
5.C 1/3 ( a third of the world will live in poverty for lack of resources.)

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