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Why is global population spiking? _00003302
Why is global population spiking? _00003302

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    Why is global population spiking?

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Why is global population spiking?

CNN's Errol Barnett explains why the world's population will cross 7 billion, and what experts say needs to be done.

Why is global population spiking?

CNN's Errol Barnett explains why the world's population will cross 7 billion, and what experts say needs to be done.