Ron Bailey goes there. Matt dissents. Jonah Lehrer thinks it depends on what you mean by happy. But children are definitely not green:
Your net carbon impact depends far more on the number of children you will have than any other variable; remember good environmentalism uses a zero rate of discount. So people with no biological children should be allowed to fly a lot and people with lots of biological children should not get to fly so much at all.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2008/02/children-vs-happiness/219503/
