We wouldn't be true TV nerds if we didn't say we've learned a lot about the environment from our favorite characters.

In fact, some of our favorite shows feature very Earth-conscious characters.

To celebrate Earth Day and those who are making a difference (even if it's fictional), AOL TV presents our five favorite environment-lovin' TV characters.

Lisa Simpson, 'The Simpsons'
Not only is she a vegetarian -- yes, there are environmental benefits in being a vegetarian -- Lisa cares deeply about the environment. After all, 'The Simpsons Movie' kicks off with an environmental crisis and Lisa is right there to lead the charge in the cleanup. "Lisa believes in leaving the Earth a cleaner and better place than she found it," Yeardley Smith, the voice of Lisa Simpson, said in 2001.

Bizarre but fun list over at Topless Robot, the 11 most disturbingly adult scenarios in 90's cartoons. There's child abuse revelations on X-Men, Batman having a heart attack, and this one from Captain Planet, as the gang is attacked by ... drug addicts.

Dennis Haysbert recently claimed that his role as President Palmer on 24 may have helped pave the way for a viable African American presidential candidate. He went on to claim that his portrayal of Nelson Mandela in the movie Goodbye Bafana ended apartheid and that his role as Jonas Blane in The Unit cured polio. Haysbert was then wrestled to the ground by his handlers and is now "recuperating" at the Clay Aiken Home for Delusional Celebrities.

My first thought upon hearing this news was that Dennis Haysbert is obviously insane. Since I've been criticized in this space for not having an open mind about insane things, I decided to take Mr. Haysbert at his word. I then went even further and went to work putting together a list of other politicians who exist mainly due to the hard work done for them by TV actors. After researching Wikipedia for almost a full fifteen minutes, this is the list I've managed to put together...

Unless you've been hiding under an ozone-filled nuclear waste facility hidden in an Arctic glacier that has recently begun to melt, you know that today is Earth Day. Now, while other Earth Days have been important, this year's is down-right significant thanks to media reports letting us know that global warming is finally here. This is pretty serious, especially to those of us with young children. We certainly want to do anything in our power to stop global warming so all of the planet's resources aren't used up and we need to travel to another planet in a spaceship flown by Joey Tribbiani.

With that in mind, the environmentally-friendly folks at TV Squad (we write all of our articles on recycled toilet paper) have decided to point out those television characters who don't give the environment the credit it deserves. Some are actually trying to harm it on purpose (I'm leering in your direction, Rush Limbaugh), while others don't know that they are doing anything at all. Here are but a few of the most wanted.

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