Aredwood:
You have missed my point. If we get rid of cows in NZ, it will just mean more cows in other countries. The same pollution and emissions would still happen. Cows only sh!t in rivers because we let them. The big dairy companies have their own rules requiring their farmer suppliers to keep cows out of rivers. But they can't control farmers who are not suppliers to them. As usual, a few people ruin it for everyone else.
I don't believe I did miss your point. Your argument is the same one always used to justify doing nothing. Why should we be the ones to go first? Someone else will just take advantage of it. And so we all join hands and merrily dance over the cliff.