The only way cattle are "eco-friendly" is in the cattle+marginal land equation.
Even modern feedlots only takes cattle after they've spent a while grazing and quality of the resulting meat has been criticized. Cattle that spent all of it's life indoors could plausibly have many more problems than one see for today's meat.
Even modern feedlots only takes cattle after they've spent a while grazing and quality of the resulting meat has been criticized. Cattle that spent all of it's life indoors could plausibly have many more problems than one see for today's meat.
http://en.wikipedia.org/wiki/Feedlot