Its interesting. My oldest sibling is turning 30 this year and they are very concerned about climate change and the world their kids may someday inherit.
Meanwhile a friend younger than me is trying to have her first kid.
The fear is there but not evenly distributed. I personally am a bit of an antinatalist, at least to the degree that I feel its irresponsible to be having new kids while an overloaded foster care system still has children in need of parents.