A new Oxford University study pinpoints for the first time how high- and low-meat diets impact the planet.

The research shows that a big meat-eater’s diet produces an average of 10.24 kg of planet-warming greenhouse gasses each day. A low meat-eater produces almost half that at 5.37 kg per day. And for vegan diets - it’s halved again to 2.47 kg a day.