It's unfortunate that people can't see that junior dealing with the effects of climate change in 30, 40, 50 years could be a lot more devastating to his life than the prestige level of his preschool.
You are not seeing this from its full potential. By going to a better school kid is more likely to get better access to opportunities which then allow them to better survive any potential climate issues. So the parents are thinking rightly about this.
("Honey, if we get a solar roof it will help the planet, but we'll have to put junior in the cheaper preschool to pay for it. Whatya think?")