Nope, can’t support it.
I’m all for decreasing the amount of harm we do to the environment. I’m all for making the choice to reduce the number of kids you have if that’s what you want. I’m all for having fewer children because it’s better for the environment.
What I worry about, though, is who will be pressured to reduce their “child output,” and which characteristics will be valued when we’re deciding which reproducers make the cut. I’m tired of reproduction and women’s bodies being so thoroughly politicized.
I realize that the article is about voluntarily having fewer children. But at some point, if this catches on, the conversation will move past “This is a good, environmentally-friendly choice.” At some point, public policy will come into play. It’ll shift to a discussion of how we can incentivize people to make the fewer-children choice, and incentives easily shift into coercion. The people who are most vulnerable to coercion are often the ones who have the least power. Hopefully I don’t have to spell out what that means in a society as inequitable as ours, with a history as ugly as ours.
Update: Just to quickly clarify, I’m not arguing that we shouldn’t position having fewer children as an ethical and responsible choice, or that we shouldn’t discuss it. Of course we should. I’m arguing that the policy implications that could come out of this are not very pretty, and that when we deal with population control, we need to walk very, very carefully.