Should we swap meat for vegetables to save the planet?

Scientists reckon global targets for greenhouse gas emissions will be missed if consumption of meat and dairy products increases at its current rate.

That's because a single cow belches up to 500 litres of methane gas every day, and methane is a more potent climate change gas than carbon dioxide.

So this study urges people to eat only two portions of red meat and seven of poultry each week, with fish and vegetables at other times.

So will the idea catch on?

We talk to one of the report's authors, Professor Pete Smith from the University of Aberdeen in Scotland, and Norman Bagley, from the Association of Independent Meat Suppliers in the UK.