Minimal use of fossil fuels — cattle harvest their own feed and spread their own manure!
Reduced disturbance from machinery benefits wildlife, especially ground-nesting birds
Cleaner water — Grasslands have less run-off and soil erosion than cropland
Rotationally-grazed pastures have more earthworms and diverse soil micro-organisms

Cattle are born and raised on pasture — not feedlots and cement floored mega-barns, so they have less hoof and leg injuries, and rarely suffer the breathing problems and skin ailments that often afflict cattle kept indoors.
Less flies and parasites because the herd is constantly moved to fresh grass and kept ahead of the flies and manure. Less time standing and sleeping in muddy barnyards!
Cattle are free to choose from wide variety of natural forages and can self-medicate from herbal remedies growing in the pastures.
Less stress — when cattle have room to roam and can enjoy the normal social behaviors inherent in herd animals, they are healthier and live longer.
Calves are raised by their mothers, not fed milk replacer from bottles or buckets