Ahead of the UN Climate Change Conference (COP 23) next week, the McCartney family has released a Meat Free Monday documentary short called ‘One Day a Week’ about the huge contributor to climate change that is often left out of conference discussions – animal agriculture.

Featuring Paul, Mary and Stella McCartney, Woody Harrelson and Emma Stone, ‘One Day a Week’ uses breathtaking aerial photography and hard-hitting facts to highlight the damaging environmental impact of animal agriculture and encourage people to help.

“There’s a simple but significant way to help protect the planet and all its inhabitants,” says Paul McCartney to camera. “And it starts with just one day a week. One day without eating animal products can have a huge impact in helping maintain that delicate balance that sustains us all.”

Watch ‘One Day a Week’ HERE: