Canada's Sandra Oh -- star of the hit television show Grey's Anatomy -- is a driving force in helping keep the planet green. (Dave Thomas, Sun Media Files)

LOS ANGELES -- Sandra Oh doesn't just talk the talk.

She really does walk the walk -- in a three-year-old hybrid car.

While there's a lot of yammering out of Hollywood about the environment, most stars of Oh's calibre would never be caught with their spray-tanned legs emerging from a vehicle that wasn't fresh off the lot.

Yet Oh, the star of TV's Grey's Anatomy, is seen all over town in her light-blue Toyota, dings on bumpers and all.

Her alma mater, Sir Robert Borden High School in her hometown of Ottawa, should be proud she's keeping things up. As student council president there in the 1980s, she led the charge against the use of styrofoam cups.

"She's great," says Carly Lee, who works at the Whole Foods market in Los Angeles where Oh, 38, is known to shop.

"A lot of people say they're for the environment, but it's the small things that say a lot about people -- you'd be surprised how many celebrities wouldn't be caught dead even using recyclable bags.

"Sandra lives what she preaches, she would never not remember to bring her own bags and she's proud to drive around in a pretty old car."

HIGH ON FLOOD: James Cameron, the Ontario-born director of Titanic and The Terminator, was seen standing in the aisle of a bookstore near his Malibu home, riveted by a book he just picked up. Spies say it was fellow Canadian writer Margaret Atwood's acclaimed new novel, The Year of the Flood.

Cameron is nearly finished post-production on Avatar, his latest big-budget movie to be released Dec. 18. Could he be out scouting for new projects?

I'LL HAVE WHAT SHE'S HAVING: Alanis Morisette says it's the vegan diet. Whatever it is -- the diet, the new career, the new boyfriend -- it's working. The Jagged Little Pill platinum singer turned successful Weeds actress is looking more stunningly beautiful by the day with her leaner body and angelic smile.

The Ottawa native was videotaped exiting a Malibu sushi restaurant Sept. 1 with lawyer boyfriend Tom Balanco, radiating sunshine.