So who is the best pitchman for the already-legendary B.C. bud? The Cannabis Growers of Canada (CGC) or Seth Rogen?

The CGC posted a public service ad on its web site that begins very much like a standard tourism commercial. "British Columbia, home to the most beautiful landscapes in the world," it begins, with shots of its picturesque mountains and waterways. And then it's on to vineyards, hot springs, skiing, snowboarding, and mountain biking. "In B.C., we strike the right balance between nature and nurture," the narrator says.

Then he begins extolling the virtues of the growers in province's medical marijuana industry: "...in the last 30 years, did you also know that B.C. was home to the best cannabis in the world? B.C. bud is world renowned for its taste, aroma and potency."

The ad portrays the cannabis industry as very much a part of mainstream life in B.C., one of the things that makes it a great place to live and visit. Here's the ad itself:

Now the B.C.-born Rogen also promotes B.C. bud, but in his inimitable fashion. In our post on David Letterman's top 5 marijuana moments from the Late Show, we included a 2012 conversation between Rogen and Letterman on the subject of cannabis. In his final question, Letterman asks Rogen about the best place to buy marijuana.

"I'm not just saying this because I'm from there, but Vancouver British Columbia, is the home of the best marijuana on earth."

You can find this exchange at the 4:15 mark, but it's worth tuning in for the whole conversation.