Population 7 Billion: What's The Impact? (SLIDESHOW)

10/31/2011 10:29 am ET | Updated Dec 31, 2011

We're officially there. As we hit the 7-billion mark Monday, celebrations were held around the globe. But what's the toll of this growth on struggling populations, on the environment and on already-strained cities? 7 Billion Actions provides everything you need to know surrounding actionable news on the topic. Here's a glimpse:


Photos: AP

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