水是疾病傳播的重要媒介.
水污染對(duì)人體的危害是多方面的,當(dāng)人體受到化學(xué)有毒物質(zhì)污染后,會(huì)引起人的急性或慢性中毒.如果汞、鎘、砷、氰化物、農(nóng)藥、多氯聯(lián)苯等侵入人體后,都可以引起人體中毒.污水中有害物質(zhì)在土壤中積累并被植物吸收,加上不適當(dāng)?shù)厥褂没瘜W(xué)農(nóng)藥,會(huì)使大量殘留的有害物質(zhì)散布到田間,繼而污染糧食、蔬菜、煙葉等農(nóng)副產(chǎn)品,引起疾病.另外,水污染還會(huì)引起水媒介的傳染病,如人畜糞便等生物性污染,可以引起細(xì)菌性腸道傳染病,如傷寒、痢疾、霍亂等.
Water is an important medium for the spread of the disease.
The harm of water pollution on the human body are many,when the human body by the toxic chemical pollution,cause acute or chronic poisoning people.If mercury,cadmium,arsenic,cyanide,pesticides,polychlorinated biphenyls,invades the human body,can cause human body poisoning.Sewage harmful substances accumulate in the soil and uptake by plants,and inappropriate use ofchemical pesticides,will make large amounts of harmful substances residue spread into the field,then the pollution of food,vegetables,tobacco and other agricultural and sideline products,cause disease.In addition,the water pollution will cause water media of infectious diseases,such as human and animal feces and other biological pollution,can cause bacterial intestinal infectious diseases,such as typhoid,dysentery,cholera.
希望可以幫到你,更上一層樓!讓我們共同努力吧!加油