There's nothing wrong with this being a list of nonfiction. I'm just wondering what's being published in the area of environmental fiction for children. I've done a quick Internet search and can't find anything. Environmental books for children seem to focus on teaching them something. There doesn't seem to be many books out there with fictional worlds built around characters living an environmental lifestyle as a sort of setting or background, as a norm instead of something someone must learn to do because of a looming crisis. Or many books with fictional worlds about living within nature as a given.
Also, I don't see any YA on this list. Nor have I been able to find a list anywhere of environmental books specifically for that age group. Eco-fiction Books Coming in 2021 at dragonfly.eco includes a couple of titles described as YA.