On your point of cow farts, before the Europeans came to the Americas, I've seen estimates that there were over 60 million bison. When the Spanish came, they brought horses and their population quickly swelled into the millions as well. I don't think cows are an issue.
On your point of cow farts, before the Europeans came to the Americas, I've seen estimates that there were over 60 million bison. When the Spanish came, they brought horses and their population quickly swelled into the millions as well. I don't think cows are an issue.