高二英語作文海洋污染

1、第 PAGE4 頁 共 NUMPAGES4 頁高二英語作文海洋污染高二英語作文海洋污染1The seas and oceans receive the brunt of human waste, whether it is by deliberate dumping or by natural run-off from the land.In fact over 80% of all marine pollution es from land-based activities and many pollutants are deposited in estuaries and coastal

2、waters. Here the pollutants enter marine food chains, building up their concentrations until they reach toxic levels. It often takes human casualties to alert us to pollution and such was the case in Minimata Bay in Japan when many people died as a result of a pollutant building up in food chains. A

3、 factory was discharging waste containing methyl mercury in low concentrations into the sea and as this pollutant passed through food chains it became more concentrated in the tissues of marine organisms until it reached toxic levels.As a consequence 649 people died from eating fish and shellfish co

4、ntaminated with mercury and 3500 people suffered from mercury poisoning.高二英語作文海洋污染2The task of the first marine protected right to stop over-exploitation of living marine resources and secondly to protect the habitat of marine life or habitat, in particular, their migration, spawning, foraging, avoi

5、ding predators coast, tidal flats, estuaries, coral reefs, it is necessary to prevent the heavy metals, pesticides, oil, organic and easy to produce nutrients such as eutrophication of marine pollution. Preservation of the marine living resources of the natural regeneration capacity and water purifi

6、cation capacity, preservation of the marine ecological balance, to ensure sustainable human development and utilization of the oceans.高二英語作文海洋污染3Several problems are caused by the non-organic substance. We ought not to pour wastes into the ocean, because it not only pollutes the ocean, but also lead

7、 to a series of harmful consequence. First and foremost, the non-organnic things, for instance, plastic bags, may kill fish and whales. Second, fishes cant digest them. Finally, some of the rubbish is inherently toxic, they will posion marine life.As a captain of the ship, you should spare no effort

8、s to think more helpful ideas and stop dumping rubbish from now on. We all need to raise awareness of these problems. It now bees necessary that we must act now, before it is too late!高二英語作文海洋污染4Between 75 and 80% of marine pollution is caused by land, particularly agriculture. 30% of this is from t

9、he atmosphere. Around 12% of the pollution is caused by maritime transport.Marine pollution is the result of products being thrown into seas and oceans, mostly by mnkind: domestic waste (sewage and rubbish, pollutants in runoff water.), industrial waste (hydrocarbons, metals, synthetic chemical and organic substances, radionuclides.) and agricultural waste (fertilisers, pesticides.).This includes water pollution and marine sediments, and more generally all damage to marine ecosystems caused by harmful substances being discharged into the sea, either by their nature or their quantity.高二