- 相關(guān)推薦
英語聽力材料：生活里的藥品污水
關(guān)于毒**，是我們時(shí)長警惕注意的，總覺得自己不會(huì)沾惹就不會(huì)有事。但是，事實(shí)上，日常的生活中，那些被傾倒在水中的藥品，也在威脅著我們的生活。
Just as the police bang down the door, the bad guys flush the incriminating drugs down the toilet. Surely, a scenario we’ve all seen on TV and in the movies. But, you might be surprised to find out how many drugs innocently wind up in our lakes and rivers every day.
Dirty Water
Household drugs like painkillers, antibiotics and hormones enter the water system through many channels. For example, some animal feeds contain antibiotics and flood into rivers with run-off water. Antibiotics are regularly flushed or dumped down sinks and toilets. Since many sewage treatment plants don’t effectively remove drugs or hormones, these compounds enter our waterways and wind up in our tap water.
Antibiotic Resistance
Are flushed drugs a health concern? Once in a river, antibiotics might affect wildlife by killing off the normal microbes that are naturally found in the water and soil and that form the basis of the local ecosystem. Or, perhaps more dangerously, the microbes may learn to adapt and reproduce in the presence of antibiotics, developing antibiotic resistance.
At present, common household drugs are found in many lakes and rivers in relatively small concentrations, but we can do something to help. We can avoid throwing drugs down the drain and, instead, take them to a hospital, pharmacy or hazardous waste center for safe disposal.
我們在電視上或電影里總會(huì)看到這樣的場景，警察破門而入時(shí)，壞人正將罪證毒**倒入廁所沖走。但是，你可能會(huì)驚奇地發(fā)現(xiàn)每天將有多少藥品流入我們的河流湖泊里。
污水
像去疼片，抗生素，激素等家庭用藥會(huì)以多種渠道進(jìn)入水系統(tǒng)。比如，一些動(dòng)物飼料中包含抗生素，會(huì)隨水流一起流入河中。通常，抗生素會(huì)被沖進(jìn)或倒入水池和廁紙中。許多污水處理廠并不能有效的去除藥品或激素，這些化合物就進(jìn)入我們的水管中，最終成為我們的自來水。
抗生素耐藥性
該不該擔(dān)心那些被沖走的藥品會(huì)影響我們的健康?藥品一旦進(jìn)入河流，抗生素會(huì)殺死水中，土壤中正常的微生物， 而它們是形成當(dāng)?shù)厣鷳B(tài)系統(tǒng)的基礎(chǔ)，所以抗生素可能會(huì)影響野生動(dòng)物�；蛘呖赡芨呶ｋU(xiǎn)性，微生物也許會(huì)學(xué)著適應(yīng)，并在有抗生素存在的情況下繁衍，衍生出抗藥性。
目前，家庭常用藥物在河流湖泊中的濃度還不高，但是我們可以改善這種情況。我們可以不往下水道里扔藥品，將藥品帶去醫(yī)院，藥房或者危險(xiǎn)廢棄物中心進(jìn)行安全處置。
【英語聽力材料：生活里的藥品污水】相關(guān)文章：
英語聽力材料《好萊塢兒童的生活》08-28
經(jīng)典英語聽力材料11-14
英語聽力材料《酸奶》09-19
雅思英語聽力材料09-24
提高英語聽力的材料09-16
英語聽力材料《開羅》09-18
大學(xué)英語聽力材料07-02
英語聽力材料整合10-11
英語聽力材料下載10-06