Unsurprisingly, he hasn't taken kindly to being told to "go f*** himself".
Celebrities including Sir Paul McCartney have backed a campaign to offer the Pope a one million dollar charity donation to go vegan for Lent. The pontiff has made a number of comments about climate change, and campaigners are hoping he could influence millions of Catholic followers around the world to consider a plant-based diet.
Eating plant-based isn't some sort of panacea that will solve all our ailments, but we need to make the most of our increasing understanding of the link between diet and disease
A plant-based diet doesn't mean you have to avoid cheese. With more and more people going vegan in the UK, supermarkets are increasing their cheese alternatives, with new flavours and varieties appearing all the time. Our HuffPost UK team took it upon themselves to try a selection available in Tesco, Asda and Wholefoods. Some were a roaring success... some not so much.
More people than ever are turning to a plant-based diet - whether it's for health reasons or environmental. There are a lot of conflicting opinions about the vegan diet but here are a few facts to help you make the choice.
Every day with Olga and her waggy tail by my side, blindness is just a little bit more bearable
What's with all the bacon jokes and arguments about 'proper' veganism?
So why do people hate vegans so much? Like all prejudice, it springs from ignorance and fear. But it goes deeper than that.