You're teaching a unit on the environment and you need books that all point at the same question from different sides, at reading levels that run from a five-year-old on the carpet to a thirteen-year-old with a novel. These eight do that. Hand each child the one that fits them and let the class come back together to talk. They also disagree with each other, on purpose. One is a rhyming fable, one is a woman with a crochet hook, one is a pledge against a pipeline, one is a journalist taking apart a hamburger. Read the heads-up before you pick, because the emotional range here is wider than the age range.
The eight books here answer one question, what does it mean to take care of the world, and they answer it differently enough that a class can argue. Any single one satisfies the whole idea on its own. Pick by the child. What they have in common is that six of the eight are about a specific person in a specific place with a specific problem, which is the antidote to the vague planetary dread that makes this subject so hard to teach. They differ most in what they claim. Three of them are pure nature-love with no argument in them at all. Three stay with a concrete local mess: litter, cut trees, a well too far away. Two make a case about a contested question and ask your child to come along. Every entry below says which is which, so you can build the unit you meant to build.