它们自由自在、无拘无束地在野外生活，当然要比集约养殖的鸡和猪好。
It had a pretty footloose and fancy-free life in the great outdoors - certainly better than that of a factory-farmed chicken or pig.
巴西东北部和墨西哥等集约化养殖地区的最佳生长期可能会降至120天以下，这对玉米等作物的成熟至关重要。
Intensively farmed areas like northeast Brazil and Mexico are likely to see their prime growing seasons fall below 120 days, which is critical for crops such as corn to mature.
克朗计算出在集约奶牛养殖使用的草炭牧场每年的温室气体排放量为每公顷16000公斤二氧化碳当量。
Kroon calculated that the annual greenhouse gas emissions in a peat pasture area used for intensive dairy farming were 16000 kilo of CO2 equivalent per hectare.
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