Also, concerns about the impact of dairy farming on the environment could be a factor.

此外，对奶养殖对环境影响的担忧可个因素。

Research has also found beef cattle need 28 times more land than pork, poultry or dairy farming.

调查还发现饲养肉需要的土地饲养猪、家禽和奶的28倍。

They are testing whether dairy farming is possible in the center of one of the world's most industrial areas.

他们正在测试，在世界上最具工业化地区之的中心否有可畜养奶。

Before federal protection, the area was used for ranching and dairy farming.

在联邦保护之前，该地区用于牧场和奶场。