Despite its premise -- a couple of friends decide to have a kid together -- there are lots of reasons to think the movie Friends with Kids would be sympathetic to the childfree.

1) Start with the movie poster: "Love. Happiness....

Population growth tends to get blamed on other people: Africans and Asians who have "more kids than they can feed," immigrants in our own country with their "large families," even single mothers in the "inner city."

But actually the population problem is all about me: white, middle-class, American me. Steer...

As we zoom toward seven billion, population growth is looking ever more hairy and daunting. The big-picture solution is empowering women everywhere and making sure they have the tools, knowledge, and support to control the size of their families, but that's not something an average person can tackle...

Climate hawks are floundering after this year's election. A climate bill couldn't get through Congress even when it was controlled by the Democrats, thanks to Senate dysfunction and general idiocy. Now, with the GOP and Tea Party ascendant, the chances of passing curbs on greenhouse gases anytime...