You may be surprised when I say I do want children and I believe you when you say it's a wonderful experience. However, the dilemma the argument above poses is an interesting one, and one I have encountered many times. Hence why I say this at the end "Should we even care? Why should we sacrifice our own priorities?". I'm really just asking if anyone would go to this extreme. I doubt it, and thus the solution is most likely not to go childless to 'Save the planet'. Hope this explains my point of view a bit better.