The pollution of domestic animalexcrement on enviroment was more regarded with expand scale of animal production and increase of intensive.
随着畜牧生产规模的不断扩大和集约化程度的不断提高，畜禽排泄物对环境的污染已受到普遍重视。
2
There are many problems in the present animal husbandry, livestock produce leftovers and animalexcrement affect and harm animals, mankind and the environment.
现在的养殖业存在许多问题，畜产品残留物及动物排泄物影响动物本身、人类和环境，带来了一系列危害。
3
Vegetation matter, esp. when mixed with animalexcrement, will also contribute to the water retention property of the growth medium in addition to its slow release nutrient.