Mary, Paul, and Stella McCartney have beef with your meat-eating.
Mary, Paul, and Stella McCartney have beef with your meat-eating. MPL Communications Ltd

"One day without eating animal products can have a huge impact in helping maintain that delicate balance that sustains us all,” says ex-Beatle Sir Paul McCartney in a new short film called One Day a Week, which promotes the idea that current meat production and consumption are unsustainable and partially responsible for climate change. (I touched on some of the points made in the film [see below] in "How [and Why] to Become a Vegan in College.")

In conjunction with the UN Climate Change Conference happening this week in Bonn, Germany, world-famous vegetarian McCartney and his daughters Mary and Stella, plus actors Emma Stone and Woody Harrelson are lending their prominent voices to the Meat Free Monday campaign, which began in 2009. Its goal is to encourage people to make an easily achievable lifestyle change to lessen harmful impacts on the environment through dietary decisions—e.g., going at least one day week without eating meat.

On a musical note, One Day a Week's soundtrack contains tracks from McCartney's 1997 classical-music album, Standing Stone, as well as an unreleased song, "Botswana."