We could stop global warming and curb the population explosion in just a few years

Not that I really see this as a viable solution.

Study: Nuclear War Between India and Pakistan Would Trigger Global Starvation

I can remember a conversation with a bunch of other hippies around 1970, in which a nuclear war was proffered as a solution to the coming crises caused by  over-population. It doesn't seem as bizarre now as it did then (although I seem to recall that it was my suggestion - hey, we were just brainstorming; don't be so judgemental).

It's been many years since I read Swift, but I think his proposal was that the poor could eat their children. Not exactly the same thing.