>Captain Planet and the Planeteers (1990–1996) was a pioneering animated series designed by Ted Turner and producer Barbara Pyle as environmental, pro-social "edutainment" to influence children towards ecological activism. It aimed to combat pollution and encourage environmental stewardship, often using over-the-top, stereotypical villains to represent corporate greed and ecological destruction.
Our parents let us get brainwashed by hippies and corporations as kids haha
(ETA: Not to mention that the biggest takeaways from such shows was that individual action was sometimes more important than corporate or regulatory action, a message itself designed by the oil companies to avoid responsibility. If there was propaganda in those shows, it may not have been the heroes winning, but the idea that all we need are a few magic heroes rather than government regulations.)