Here are more additions to The Best Resources For Learning About Our World’s Population Of 7 Billion:
The world at seven billion is a fascinating interactive from the BBC, which includes the option of figuring out which “number” you were in that 7 billion.
World Population: 7 Billion is a photo gallery from The Boston Globe.
Here is another cool video from npr
http://www.npr.org/2011/10/31/141816460/visualizing-how-a-population-grows-to-7-billion