Global population: There are now 8 billion people living on our planet, but they are not the cause of global warming

With Earth's population hitting a projected eight billion, it's easy to draw the conclusion that climate change is the result of too many people consuming energy.

But scientists say it's not that simple. Climate change, they say, is more a matter of overconsumption than overpopulation. And there isn't a neat correlation between between the two.

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