The situation is worse than that : monarch butterflies can be reared in controlled laboratory conditions from eggs to death , varying only exposure to bt maize pollen .

同以上相比更糟糕的情况是：帝王蝶可以在可调控的实验室条件下被饲养，从卵孵化到死亡，不同的仅是接触的转基因玉米花粉。

Dna testing of the animal is currently underway to determine its subspecies , which may offer clues to whether it had been poached from the wild or reared in captivity .

目前dna检测正在进行中，检测可以鉴别出小虎崽的确切种类，并由此可能提供关于小虎崽是被他人野外偷猎抑或是被捕后饲养的线索。

A 2006 study by researchers at the university of chicago 's department of the geophysical sciences found that intensively reared chicken generates 1.67g of " co2 equivalent " per kcal .

2006年芝加哥大学地球物理学院一项研究发现集中饲养的鸡每大卡产生1.67克“二氧化碳等价物”。

In order to meet this growing appetite , animals will no doubt be reared more intensively and cheaply with factory farming and aquaculture ( fish farming ) causing further pollution , water and land usage .

为了满足增加的这些口味需求，动物们无疑被会更加密集和劣质的饲养，同时会伴随着工厂化养殖和水产业导致的更大污染、更多陆地和水资源占用。

There is no evidence of any health dangers . In 2008 , following a five-year investigation , the us food and drug administration declared meat and milk from cloned cows and their offspring to be indistinguishable from that from traditionally reared livestock .

没有证据显示会对健康有危害，2008年，在一个五年的调查后，美国食品和药物管理局宣称来自于克隆牛及其后代的肉或奶跟传统饲养牲畜是难以区分的。