Daisy the Cow leads a typical bovine lifestyle, soaking in the sun, munching cud and farting. Yes, farting!!. That seemingly innocent cow is actually releasing toxic methane vapours, quietly responsible for an astonishing proportion of global warming gases - 18 per cent of the total, to be precise. With each fart capable of propelling her from one grassy platform to another, Daisy is making our world a warmer place to live in.