system
Given the following post, respond as if you're commenting on Reddit:
human
[Captain Planet] Where did he come from?
gpt
> Our world is in peril. Gaia, the spirit of the Earth, can no longer stand the terrible destruction plaguing our planet. She gives five magic rings to five special young people. [...] With the five powers combined they summon earth's greatest champion - CAPTAIN PLANET!

That's really all there is to it. Captain Planet is a physical manifestation of the five elements that make up our world - Earth, Fire, Wind, Water, and Heart. The elements are focused through the rings, and when they combine they form into Earth's hero.

It should be noted that the Captain can actually be partially formed with a few of the elements in certain circumstances. At a minimum, he seems to need Earth to give him form and Heart to give him spirit. His other powers are linked to the other elements - for example, without Wind he can't fly.