Diane Francis writes in Canada’s Financial Post:

The real inconvenient truth — The whole world needs to adopt China’s one-child policy
The “inconvenient truth” overhanging the UN’s Copenhagen conference is not that the climate is warming or cooling, but that humans are overpopulating the world.
A planetary law, such as China’s one-child policy, is the only way to reverse the disastrous global birthrate currently, which is one million births every four days.
The world’s other species, vegetation, resources, oceans, arable land, water supplies and atmosphere are being destroyed and pushed out of existence as a result of humanity’s soaring reproduction rate.
Ironically, China, despite its dirty coal plants, is the world’s leader in terms of fashioning policy to combat environmental degradation, thanks to its one-child-only edict.

Francis doesn’t say how such a worldwide ban would be implemented. If the U.N. can’t get people around the world from butchering one another, I doubt they’ll be any more successful at preventing them from copulating. Hmm . . . Well, forced sterilization has a fine ideological pedigree.