And banning CFCs so the hole in the Ozone layer started healing. We don't need population control to reduce carbon emissions to reasonable levels (note we don't need to prevent all emission of carbon; that's not the goal)

> "note we don't need to prevent all emission of carbon"

Yeah, we only need to cut back carbon emissions to the point that the Earth's natural carbon cycle systems can actually cope with it (and drastically cut back on the unchecked destruction and poisoning of Earth's natural coping systems in general while we're at it).