Superman, fighting for truth, justice, and the American way. And doing so--by speaking out against society's ills. Sure, super strength, super speed, and the ability to fly come in handy here and there, but nothing beats the power of the spoken word. See below for proof!
First are two public service announcements (PSAs) against smoking. Both were created and aired in the United Kingdom, and you can tell by the children's accents. The voice actor for Superman, however, is trying to fake an American accent--and failing miserably. Still, smoking sucks, so the PSAs are worth it. The animation is pretty good for a PSA, and I like Superman's tough attitude.
Next we're back in America, and this time Supes is reminding us to watch our cholesterol. Or more accurately, Clark Kent is. Clearly inspired by the Superman movies, the actress portraying Lois Lane bears a very close resemblance to Margot Kidder.
Finally, this PSA is likely my favorite, because I remember this one from childhood. Superman is telling a group of children how they can stay active while taking care of their asthma. This was shown quite frequently on children's TV in the early and mid 80s. Please forgive Superman's blue hair.
If anyone knows of any other superhero related PSAs, let me know in the comments section and I'll try to showcase them here. Thanks!