The finding calls into question the frequent promotion of grass-fed beef as a more environmentally friendly option. Still, other scientists say grass-fed beef wins out on other factors like animal ...

Grass-fed beef, though it's yet to be proven healthier ... There's also a selection of chicken sandwiches made with birds ...

Eat Grass-Fed Beef, Help the Planet? Research Says Not So Simple For cattle fattened in fields instead of feedlots, the grass may be greener, but the carbon emissions are not. A study out Monday ...

A study out Monday in the Proceedings of the National Academy of Sciences finds that even in the most optimistic scenarios, grass-fed beef produces no less planet-warming carbon emissions than ...