Kouchou-sensei to Kujira

Do you want to watch anime so artsy that will either relate to the deepest part of your soul or completely confuse you?
Well here you go, and since they are so short you don't have to feel like you wasted your time.

This list includes arthouse anime that are around 15 minutes or less, so movie length (Angel's Egg) or OVA/episode length (Cat Soup) are not in here.

Some of this may be a bit challenging to find, some are up on youtube and for some you'll have to get creative, buying or streaming them is probably out of the question.

This stack will feature anime with broad ecological and environmentalist themes.

For an anime to be considered environmentalist, it must primarily communicate a message regarding the condition of nature; moreover, it should portray nature as suffering, whether from pollution, deforestation, ecosystem collapse, or similar crises, in a manner that resonates with the Japanese environmentalist movement.

Feel free to recommend another anime I might miss.
Let's start with anime that is not in the database.

From Seitarou Kitayama lost anime: Physiology and Ecology of Plants (Shokubutsu seiri seitai no maki) 1922
source: Promiscuous Media_Film and Visual Culture in Imperial Japan, 1926-1945; pp.160

*Note: For this interest stack, The Anime Encyclopedia has been extensively used.
*Also, gratitude to anime-planet.com for their environmental tag. Without it, a considerable number of anime would be included here.
*Most of the descriptions were co-written using LLM technology, specifically Microsoft Bing Copilot, with the generative prompt: "Hi, can you write me a short synopsis about an anime named ..... with environmentalism themes?"

Update: On 18.8.2024, after watching the third part of the @WooKong1 anime history documentary, I added a few anime titles that were discussed in its ecological section. Overall, I highly recommend the video. A not fully animated movie mention in the video Godzilla vs Hedorah (1971)