This just reminds me of a Brass-Eye Episode "And thats a FACT!".
Its also scientifically true, that grass rots inside of cows, why do they have so many stomachs.
Think about the poor carrot, been skinned, chopped, boiled?
The moral vegie argument can be simply de-railed by analysising someones spendings, there are right now roughly 1.5Billion people in the world who are below the poverty line, dieing etc, because of a want for clean water. When we buy something like a packet of cigs, or a coffee from starbucks, we are implicitly making a choice, me over them.
So lets not get all uppity about morality of life taking.