06 Nov Infographic: How we got from 300 million to 7 billion

US National Public Radio explains it all in a nifty infographic…

… and in an episode of the NPR program Morning Edition:

[audio:http://cbfilms.ca/wp-content/uploads/2011/11/20111031_me_03.mp3|titles=How_we_got_to_7_billion]

H/T:?? (Can’t remember.)