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

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

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:

SLIDESHOW:

Photos: AP

PHOTO GALLERY
HuffPost
BEFORE YOU GO
PHOTO GALLERY

WATCH Related Video: