I'm currently watching 'Science Club' on the BBC and it has stated that the weight of all the cows in the world is greater than that of all our
wild life put together, so we can eat them and drink the milk designed for the infants of their species - not us!
The point the programme was making about the number of cows was that because we are breeding so many and using so much land/resources to do so, we are
both directly and indirectly contributing to other animal species going instinct.
And they didn't even mention the methane.............!