I've been to a company event a couple years ago, for a big Scandinavian tech company, and the main speaker's point was this: The best thing you can do for the environment, better than recycling, cycling instead of driving a car, etc., is having one less child.
So it doesn't seem to be that fringe, unfortunately.
2.5%. That is nothing of nothing. It is a non-event, and dwarfed by “I just don’t want kids” or “financial reasons”. Now that’s not “why do you have 2 kids instead of 3” but yeah.
You're confusing the impact of the decision with the prevalence of belief in it. While that may objectively be the best way to combat climate change, it doesn't imply anything about how many people are making that decision for that reason.
