In honor of Earth Day, here's my quick list of TV's most eco-friendly shows or channels:

24 (Fox) - Believe it or not -- and I wouldn't blame a little healthy skepticism -- Fox's amped-up action adventure show claims that it has become carbon-neutral this season, offsetting 2,179 tons of CO2 emissions by using biodiesel and hybrid vehicles, purchasing renewable energy and buying carbon energy offsets. That's a lot of explosions and car crashes.

Sundance Channel’s The Green – For three seasons, Robert Redford’s indie-oriented cable channel has offered ecology-themed shows. Best example: Isabella Rossellini’s Green Porno, a nature show about how animals have sex, featuring the actress sometimes acting out the process in odd, postmodern-looking costumes. Seriously.

Planet Green – Forget about a measly few hours a day; Discovery Channel created its own channel last year to feature eco-friendly TV shows such as Emeril Green, Alter Eco featuring Entourage star Adrian Grenier and Go for the Green, a game show with  -- who else? – Tom Green as host. And they actually use the term “eco-tainment.”

Living with Ed (Planet Green) – At times, you wonder whether this unscripted series, which follows the life of longtime environmentalist /actor Ed Begley Jr. and his eco-conscious celebrity pals, hurts the green cause more than helps. But watching Begley bore West Wing co-star Bradley Whitford on the minutiae of dishwashing and composting is still pretty eco-taining, anyway.

Whale Wars (Animal Planet)/National Geographic Channel documentaries – Few channels offer a more amazing collection of nature documentaries than NatGeo, which profiles a group of whiz kids turning garbage into new products in Garbage Moguls at 9 Wednesday. And Animal Planet’s thrilling series about the Sea Shepherd Conservation Society’s efforts to stop whalers on the high seas – sailing a ship dubbed the Steve Irwin -- combines unscripted drama with an eco-friendly message.    

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