Nobody talks about this one. A single episode that doesn't lecture you or dress up climate collapse in metaphor, it just follows ordinary people making small choices, and lets you feel the weight of what those choices mean when multiplied across a lifetime. The animation is quiet, almost mundane, which makes it hit harder than any disaster sequence ever could. It's designed to plant a seed, not to convince you in one sitting. For viewers who need environmental stories that trust them to understand the stakes without being shouted at.
Watashitachi no Mirai is a single-episode educational OVA from 2018, produced as part of the Save our mother earth project. The non-commercial film was never meant for theaters or television. It was shown in schools and communities across Japan to help people understand global warming. The project takes its name from environmental essays by the late Tezuka Osamu.