Adored by the Network: Ted Turner loved this series.note Hardly surprising, since the show was his idea in the first place. However, most people didn't, not just because it was preachy, but because it supposedly played a part in how SWAT Kats got screwed over. However, that's since been proven to be a rumor: Turner had nothing against the show; H-B cancelled SWAT Kats to devote their resources to the World Premiere Toons/What-A-Cartoon! project; indeed Captain Planet ended at about the same time.
The Danza: Joey Dedio as (Joey) Wheeler. Subverted in that Wheeler was hardly if ever referred to by his first name.
Fake Russian: Linka's American voice actress, Kath Soucie. "Linka" isn't even a valid Russian name. It could conceivably work as a nickname. You might call a girl named Galina "Linka", for example, but, as a proper name, it's more West Slavic.
Keep Circulating the Tapes: a few VHS tapes containing 1-2 episodes were released a ways back but they are now out of print and very hard to find. Shout! Factory did release season 1 to DVD but never released the rest of the series due to low sales.
Prop Recycling: The first episode of had Hoggish Greedly attack Planet with a hose that spewed toxic waste; it looked very similar to the neutrona wands on the Ghostbusters' proton packs (both series were made by DiC, although Planet moved to Hanna-Barbera later on).
The executive producer of the show, Nick Boxer, once pitched the idea of removing Captain Planet, the show just being the "Planeteers". But Ted Turner rejected the idea, so the team attempted to find way to keep the Planeteers empowered while Captain Planet did the heavy lifting. One way they did this was having the kids rescue Captain Planet himself when he is downed from time to time by the villains. So in a way, while Captain Planet does do the heavy lifting and rescues the Planeteers, when Captain Planet is down, the Planeteers, without their powers, must work together and rescue him as well. So in a way, the producers attempt to avert a Broken Aesop.
The exaggeration of the villains to the point of cartoonish supervillainy meant that children watching the show would not be troubled by their parents if they worked in a polluting industry. Loggers, for example, are not monsters, but had they been portrayed as such, that could have caused confusion and conflict, so the bad guys had to be as over the top as possible.
A producer was unsatisfied with a number of facial designs for the Captain until one of the artists finally submitted the producer's face as a joke... and to make a longer story shorter, that is why Captain Planet looks like Mr. Boxer (though one would suspect the latter never had a green mullet or the superhero musculature).