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随着物质文明的高度发展和科技进步,人类对环境的不适当或过度的开发给环境带来了严重的危害。许多化学品在生产、运输、使用、废弃过程中都不免会进入环境中。通常情况下,环境本身具有一定的自净能力,但是当污染物数量、浓度和持续时间超过了环境的自净能力,即可破坏生态平衡,从而造成环境污染。天然的动植物食品原材料很少含有有害物质,但在这些动物、植物的生长过程中,由于呼吸、吸收(或摄食)、饮水而使环境污染物质进入或积累在动、植物中也会受到污染,降低了食品的安全性,从而对人体健康产生重大的危害。
With the high development of material civilization and the advancement of science and technology, the improper or excessive development of mankind has brought serious harm to the environment. Many chemicals in the production, transportation, use, disposal process will inevitably enter the environment. Generally speaking, the environment itself has a certain self-purification ability, but when the quantity, concentration and duration of the pollutants exceed the self-purification capacity of the environment, the ecological balance can be destroyed and the environment can be polluted. Natural animal and plant food raw materials rarely contain harmful substances, but in these animals, plant growth, due to breathing, absorption (or feeding), drinking water and make the entry of environmental pollutants or accumulation in the animals, plants will be contaminated , Reducing the safety of food, resulting in significant harm to human health.