Lisa Simpson, Treehugger

On the eve of the 20th season of "The Simpsons," here's how the characters of the show are going green.

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Because it's Friday, and the world is preoccupied with economic collapse, here's a bit of levity. In honor of the 20th season The Simpsons will be on the air, Lisa Simpson, the greenest member of one of America's most famous families, recently chatted with National Geographic about the ways that she's encouraging Homer and company to go green. And no, it doesn't involve organic doughnuts.

Some excerpts:

What is your family doing to "go green"?


Well, my Dad said his bald spot is "a solar panel for a love machine." I don't know what that means, but I'm looking into whether we can hook it into the grid and get carbon credits.

Have you been able to convince your Dad to recycle his Duff beer cans?


Yes. Though he was upset about having to dismantle his 80-foot "Beer-amid" as well as his "Duff Lite-House of Alexandria" and his "Colossus of Suds." Does Maggie use disposable diapers?


Yes, and so does my Grampa. Has Springfield been affected by climate change?


Yes, the most powerful greenhouse gases are escaping from me, Lisa Simpson. Bart! Get away from my computer! Sorry about that. Read the full interview here.