Neil - you are living in lala land.  Even on the most pristine grassland, it takes 3 acres of land to raise a grass fed cow.  The US has 100 million head of cattle.  That's 300 Million acres, or roughly 10% of the entire US land mass.  Forget the Rocky Mountains, the Everglades, the Desert, The Boreal Forest, etc. - lets just have cows everywhere so we can live like Kings.  You are severely misinformed and of course you are not alone.  Sorry but your grass fed beef is WAY worse for the planet then factory farming.  Carbohydrates are a necessity of life - meat is not unless you are an Inuit.