7 billion and one, 7 billion and two …

7 billionThe global population surpassed 7 billion on Oct. 31, 2011 — or maybe it didn’t. It’s an arbitrary milestone either way, but a great reminder that with more of us crowding this finite planet, we have a long way to go on women’s rights, cutting consumption, fighting income inequality, figuring out how to feed everyone, grappling with growth, and simply talking about sex.