"My wife is super green. I've got those napkins that are made from wood chips,” admits Jerry Seinfeld, who returns to NBC as executive producer and sometime participant in the new series The Marriage Ref, which premieres in the post-Olympics slot on Feb. 28 before settling into Thursday nights at 10 p.m. on Mar. 4. Seinfeld, who has been married to his wife Jessica for 10 years, got the idea for the show when they were having a silly argument and asked a friend to settle it. “It was Jess’ idea to do it as a TV show,” explains the comedian.

The premise: Guest stars view a clip of a couple having an argument about something (like stuffing the deceased pet dog, keeping a motorcycle in the living room). The guests take sides, and the titular ref (Tom Papa) makes his decision, “very similar to the way it’s done in sports,” says Seinfeld. “The idea is to shorten the fight.” Alec Baldwin and Kelly Ripa join him on the panel in the premiere, and future episodes will feature guests Tina Fey, Eva Longoria Parker, Larry David, Charles Barkley and Madonna.

While Seinfeld admits to being “not easy to live with” and “incredibly cranky and difficult,” very little annoys him about his spouse except when they have theater tickets and she’s running late, since he’s too well-known to sneak in unnoticed. “I get very anxious about getting out of the house on time.”

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How I Met Your Mother’s Alyson Hannigan (pictured right) says she’s “very green,” more so than ever since becoming a mom. “We use gDiapers, a hybrid — it’s cloth on the outside and there’s a liner that you can compost, but if you don’t, it biodegrades in three months, not years. We go to the farmers market all the time. We’re putting in an organic garden to grow things I can’t get at the farmers market.” Besides produce such as strawberries and blueberries “that I just want to have, we’ll do unusual lettuces and a particular kind of cucumber and a lot of different herbs.”

HIMYM’s Mar. 1 episode features guest star Carrie Underwood, and Jennifer Lopez will guest later in the month as a self-help author.

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At the Movieguide Faith and Values Awards, several moms on the red carpet proved to be of like minds when it comes to conservation at home. “Don’t use Ziplock bags for your kids’ lunches. Pack them in containers that you can wash and refill,” said Melora Hardin (pictured left) from The Office, who just released a CD called All the Way to Mars. “We have reusable containers for our kids’ lunches instead of plastic bags,” echoed Candace Cameron Bure, who also buys a lot of eco-friendly household products. Currently on a six-week break from her ABC Family series Make it or Break It, Bure is spending time with her family in L.A. and at their second home in Napa Valley. “We have our own wine label,” she notes.

Actress Ali Landry, the mother of a toddler, is a recent green convert. “I just started recycling and teaching the baby about recycling and taking care of the environment. I’m getting eco-friendly cleaning products. I wasn’t raised that way. I’d just go to the grocery store and buy anything. So it’s a whole new way of thinking,” says Landry, who’s also mindful about turning off water and lights. Busy of late with her children’s clothing line, Belle Parish, which she’s growing into a brand with a book series, Landry looks forward to shooting a World War II movie epic this summer.

Sharif Atkins (White Collar), accompanied by his nearly 7-year-old son Noah, confided that for him, green living is “a growth area. I’m still working at it. I’m on the path,” he said, explaining that he’s making an effort involving “not throwing away so many things, to cut down on the waste, and wash things all at once rather than at multiple times, which wastes water.” Atkins can also be seen in the independent movie Preacher’s Kid, which he describes as “a retelling of the Prodigal Son story.”

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How does Ana de la Reguera (pictured right) conserve water? “I never take a shower,” jokes the Mexican actress, though she’s completely serious about not flushing every time. “When I go to the bathroom and I’m alone I let it go,” she admits. “I’m not the greenest person in the world, but I do always disconnect everything when I leave. I turn the lights off. I try not to waste. I buy what I need and eat everything in the refrigerator, not throw food away.” She hates the amount of wasted plastic bottles she sees on sets. “We have to stop that,” she says.

De la Reguera stars opposite Bruce Willis and Tracy Morgan in the action comedy Cop Out, in which she plays a pivotal — and entirely Spanish-speaking — role. While in serious peril most of the time in the Kevin Smith-directed flick that opens Feb. 26, Morgan’s antics kept her laughing between scenes. Smith allowed her to alter and improvise her Spanish dialogue, which is fairly spicy. “That was my idea,” she says, noting that ironically, she recently acted in a Spanish film in which her only scene is in English — she plays a Salma Hayek-type famous Latina star. Also coming up for her is a movie bio of Mexican independence hero Miguel Hidalgo y Costilla and the second season of the HBO series Capadocia.

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“If they don’t recycle this, I will take it home with me,” vowed Erika Christensen (pictured left), indicating the plastic water bottle in her hand after a press event for her new NBC series Parenthood. Not a big fan of disposable bottles, she’d rather use one of her two big gallon-size refillable containers. “People make fun of me ‘cause I carry them around. And I ride my bicycle sometimes and I walk.”

On Parenthood, a family dramedy premiering Mar. 2, the unmarried Christensen is playing “the most adult character I’ve ever played. She’s further along in life as far as marriage and children. I like her humor and the relationship between her and her husband. They’re rather opposite people but have a way of dealing with their differences that’s really beautiful and real.” Sam Jaeger plays her spouse in the series, which also stars Craig T. Nelson, Lauren Graham, Peter Krause, Bonnie Bedelia, Dax Shepard and Monica Potter.

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Continuing its youth-focused Friends for Change eco-initiative, the Disney Channel turns its attention towards saving the oceans with “Make a Wave,” a duet recorded by teen idols Demi Lovato and Joe Jonas that will debut on Radio Disney on Feb. 26, with its music video following on the cable network Mar. 14. It premieres the next day at Disney.com and for download at iTunes, where sales proceeds will benefit environmental charities. Appropriately, the song will be featured in Disneynature’s upcoming film Oceans, due in theaters on Earth Day, April 22.

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Tune in: On Mar. 2 at 8 p.m., Sundance Channel’s The Green premieres The River Cottage Treatment: Gone Fishing, which follows chef Hugh Fearnley-Whittingstaff around Britain as he tries to find sustainable alternatives to imperiled fish. Following it at 9 is the debut of Addicted to Plastic, a documentary about the titular material’s global impact.

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Additional photo credits: Alyson Hannigan by Cliff Lipson/CBS; Melora Hardin by Gerri Miller; Ana de la Reguera by WENN.com; Mitchell Haaseth/NBC; MNN homepage photo of Seinfeld by Bryan Bedder/Getty Images