Vegetarians Pankaj and Radhika Oswal, an Indian-Australian billionaire couple, have put their money where their mouths are and opened a chain of restaurants, Otarian, that uses “Eco2tarian Labelling” – this shows the difference in greenhouse gas emissions between its veggie meals and the equivalent meat dish. 

You also earn “Carbon Karma Credits” as you munch, which can then eventually be redeemed for a free Choco Treat (Fairtrade, of course).

According to the Carbon Trust, eco-labeling will soon be as commonplace as nutritional information. Carbon diet anyone?