This story appears in the March 2018 issue of National Geographic magazine. Paul McCartney is leading the Meat Free Monday campaign, asking people to skip meat once a week to “help slow climate change, and more..

Through the interview, Paul discusses his personal choices in becoming a vegetarian and why he’s now advocating for “meat moderators”: people who reduce their consumption of meat intake as part of their weekly food routine.

“I support a lot of causes, but this particular one is personal for me because it is how I live,” said McCartney. “Through this campaign, I can say to people, ‘Just try it,’ and show people that it can actually be quite fun when you look at what you do, what you eat, how you live and think, ‘Is this what I’m gonna do for the rest of my life or would it be kind of interesting to try making a change?’”

Goldberg said, “At National Geographic, we’ve been illuminating the world for the last 129 years — first in words and pictures, and now across our digital platforms, with information that’s on the side of science, on the side of facts and on the side of the planet.

Within our yellow border, we’re creating a portal for the planet’s curious people, giving those with an insatiable quest for knowledge the information that allows them to make informed decisions and affect positive change. We are thrilled that Paul chose National Geographic to bring his message about environmental sustainability to a global audience.”