July 11 is World Population Day. We recently passed 7.6 billion humans alive on the planet, while scientists’ best estimates place sustainable world population at about 2 billion. This is an important occasion to have a conversation about our procreative choices.

Isn’t it time for the recommendation to go out far and wide that young couples should choose to have no children, or at most one child, until world population coasts back down to a sustainable level? The connection between family size decisions, climate change and carbon footprint has been getting more and more press, so we at GrowthBusters wondered if the time had finally come.

Is the public ready to acknowledge we have a moral responsibility to have fewer children? . . .