▶ Your Answer :The reading passage claims that DDT is harmful to environment including human. This contradicts the lecturer's assertion that although DDT is harmful to environments and human in large amount quantity, it can be also helpful to human and environments in fixed quantity. The first point made in the reading passage is that DDT can be accumulated in the soil and small bodies of water. It is ingested in animal's body like fishes and birds. DDT is not easily digest, it persistently stored in animals' body. Eventually it cause poisoning and death of wildlife. The lecturer, however, challenges this particular viewpoint by arguing that It is true that exceeding quantity of DDT is harmful to wildlife or environment. But, fixed quantity of DDT is actually beneficial to wildlife. Fixed quantity of DDT wipe out diseases and pests with out harmfulness. By this work of DDT other animal would have comfortable life in environment. Another point the article puts an emphasis on is that It is also toxic to human. DDT causes risk of diabetes, birth defects and various forms of cancer. To be more specific, the article give an example that In USA, DDT had actually banned by these harmfulness. In contrast, the lecturer contends that needless to say, exceeding quantity of DDT is harmful to human, but appropriate quantity of DDT is helpful to human. He gives an example that appropriate quantity of DDT successfully and effectively eliminate diseases and toxic insects with out toxicity. Finally, It is stated that in the reading that actually it is not good for elimination of diseases and pests. After short time, DDT had introduced to market, major disease (e.g. malaria) easily had resistance against DDT. On the contrary, it is accentuated in the lecture that although some disease have resistance against DDT, DDT very successfully wipe out some disease like malaria In Slianka. Over 1934 to 1955, 1.5millions malaria killed 80,000 of people. But, after the DDT using program, malaria completely wiped out and DDT saved millions of people. |