Why Grass Diet Makes Cows Methane Producers

Whether they are providing the beef for your roast dinner or the milk for your cup of tea – cows are undeniably useful animals.

The problem is they also enjoy burping and breaking wind and it's having a huge impact on global warming.

The steaks couldn’t be higher and that’s why an agricultural college in Scotland has developed the Cool Cows programme to breed the animals in a way that means they expel less gas.

Niall is joined by our udderly brilliant science correspondent, Thomas Moore.

Producers: Natalie Ktena & Tom Gillespie
Editor: Mike Bovill