The global shift to a Western diet rich in meat and dairy is putting unprecedented pressure on the planet to feed a growing population. Could a more sustainable diet resolve health and hunger crises around the world? And would people really be willing to switch to a greener menu?

Only 3% of the UK population identify as vegetarian. But thanks to a switch in tactics, the movement is gaining pace – and a weekly slot in people's stomachs. Can meat-free Michelin-starred restaurants, celebrity chefs, and veg delivery services cure people's appetite for meat?

Pret a Manger says that the chain sells around 75,000 bananas every week, making it more popular than any other item on the Pret menu. Despite the chain charging 50p per banana, consumers are happy to pay more for the convenience.

When people think of 'fast food' or the 'drive-thru', it's usually greasy burgers, deep-fried french fries and high calorie milkshakes that come to mind. But Amy's Drive Thru, a fast food restaurant in California, is challenging perceptions of the industry with vegetarian food.