Earth overflowingThe biggest threat to sustaining life as we know it on planet Earth could be humankind's still-burgeoning birthrates.

FocusEarth

Our planetary population has climbed by a billion people in just 14 years, and the growth rate continues to accelerate. That's only going to make existing problem worse, cautions William Ryerson, President of the Population Media Center.

williamryersonWilliam RyersonBirth and fertility rates are higher in many parts of the world than they are in the United States. But Ryerson points out, that does not mean population growth is not a cause for concern in this country.

So, what does all this have to do with Halloween? Nothing, really, Ryerson explains. But it did help get your attention, right?

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