Anti-natalists (as opposed to ante-natalists) might initially come across as crackpots - and in his BBC Trending article Jonathan Griffin does mention that some hold rather extreme and/or distasteful views. However, at a time of environmental crisis there is something to be said for prospective parents carefully considering the impact that having children might have, not only on them personally but also on the planet.
We succumbed to the parental impulse but stopped at one. I won't pretend that the decision was entirely or even largely motivated by environmental concerns, but they were certainly a factor. No matter how you raise your children, they are natural born consumers.