Did Hayao Miyazaki make any movie without an environmental theme?

I don't recall Kiki's Delivery Service having much of an environmental theme.

From Wikipedia:

According to Miyazaki the movie touches on the gulf that exists between independence and reliance in Japanese teenage girls. Going far beyond coming of age themes, the work deals with the nature of creativity and talent, and the central difficulty every person faces in becoming themselves, whether through luck, hard work or confidence: the inner film explores the same questions as the later Whisper of the Heart.

I believe Porco Rosso had no environmental agenda, although, how he paints the Mediterranean makes me want to go back there.

• The Castle of Cagliostro (Co-writer and director)
• The Cat Returns (Project concept, co-producer)
• Whisper of the Heart (Screenwriter, storyboards, executive producer, sequence director)
• Panda! Go, Panda! (Concept, screenplay, storyboards, scene design, key animation)

Other movies that I would argue do not have an environmental theme as the main subject:

• Howl's Moving Castle (Writer, director) - Deals with love, war
• My Neighbor Totoro (Writer, director) - Mainly about family, mystical themes
• Spirited Away (Writer, director) - Coming of age story, greed

I'm going to play devil's advocate here for minute. We often assume that when someone refers to an environment, that we only talking about nature and an ecosystem, but actually the definition for an environment is much more far-reaching than that...

Definition of environment

1 :the circumstances, objects, or conditions by which one is surrounded 2 a :the complex of physical, chemical, and biotic factors (such as climate, soil, and living things) that act upon an organism or an ecological community and ultimately determine its form and survival b :the aggregate of social and cultural conditions that influence the life of an individual or community 3 :the position or characteristic position of a linguistic element in a sequence 4 :a computer interface from which various tasks can be performed a programming environment

https://www.merriam-webster.com/dictionary/

With that being said, I would argue that many, if not all of Studio Ghibli's works are in fact about the environment, because where the characters exist often act as it's own character, or that the plots of many films are about stopping a change to the places the characters come live in/save someone from bad/secret situation, animals and/or supernatural "animal-like" beings are friends/companions, background characters, and antagonists to main protagonist, and/or blend nature with man-made machines by either the machines being a reflection of some living thing (flying machines that look like birds or insects) or there are machines existing within a more natural landscape (robots on Laputa floating Island, war planes in clear skies, upon crisp waters, ect).

So in the case of something like Kiki's Delivery Service, it's true we don't have an ecology-conscious story in the traditional sense the same way as say, Princess Mononake does, but Kiki is character that is at first excited by the nature of the town/city she comes to inhabit herself--She sees it's current existence as a positive thing. But between getting her heart broken, temporarily loosing her powers, and the threat of the Dirigible, a machine that might convey the sense of war-technology and could be seen as a "warfare", there may be a familiar subtext here about the art of creating [machines] and the 'environmental' threats they pose, which also exist in works like The Wind Rises, Howl's Moving Castle, (pre-Ghibli) Naussica, or music video, On Your Mark.