全球变暖英文论文.doc

_There is one of the most sensitive global climate issues for years, which is global warming. In general, we know that the origin of global warming is the emission of carbon dioxide. It was verified that the relationship between carbon dioxide and temperature: when there is more carbon dioxide the temperature gets warmer. This topic should be discussed under current situation to advocate people concerning with this severe environmental issue. Meanwhile, people should consider how to reduce the emission of carbon dioxide and take some actions to stop global warming.What caused global warming? It is caused by several factors. First, population explosion is one of the main factors of global warming; it also threatens the balance between man and nature. Second, atmospheric pollution is being on the rise, and it has already become an international major problem. It is also the basic problem of global warming. Third, marine ecology and environment took a turn for the worse. That may lead to the damage of fresh water resouces. Forth, erosion, salinization, and desertification of land make the ecological environment deteriorated, and flood and sand storm may happen more frequently. Fifth, the forest resources are sharply decreased by natural changes and human actions. Sixth, acid rain can destroy the forests, acidate lakes, and endanger animals. Seventh, water pollution destroyed the balance between the demand and supply of fresh water. Last, toxic chemical wastes have threats on the ecological environment on the earth surface.The second effect of global warming is to make many animals and plants endangered. Considerable data verified that more than 200 native plant species in the United States have gone extinct; more than 760 plant species in the U.S. are federally listed as endangered or threatened and 20 percent of our native plant species are in decline and on a conservation watch list (Keppler). As same as plants, there are also many endangered animals generating which are imputable to global warming, such as Polar bears. Some scientists believe the Polar bears in Alaska would become extinct in 50 years time (Keppler). These data warn us that we call for paying effort on survival of species.The last negative effect of global warming is more related to humankind. Global warming will also threaten human society. It will cause the infectious diseases too easy to spread and infect. Bacteria will hard to control through fast breeder reactor, and threat our lives. The house will be eroded by destructive insects and it may lead a vagrant life eventually. Whats more, global warming impedes outdoor activities. Some outside entertainment sports such as skiing and snowboard will be influenced by ice melting and climate change.However, is there any positive effect? Yes, there is. The widespread knowledge of global warming has already waked the consciousness of residents throughout the world. One of the major concerns in conservation is the use of plastic bags. Plastic bags are given away too freely by many stores. The amount of waste is alarming as we are reaching tons of waste each year! Plastic waste is polluting the environment and we need to address it now. There are several things being done to bring plastic recycling to the forefront where these plastic bags are concerned. Companies have started to take steps to reduce the number of plastic bags been given away in their daily operations. Some Solutions Some companies place recycling bins at their stores. When customers come back to the store they can bring their bags and recycle them easily. However, the number of bags leaving the store and the number returning are not quite equal with far more going out then coming back. There are stores that even remove the use of bags. The stores have started to encourage the use of cloth shopping bags and some stores ask the customers to purchase their own bags. Some consumers have already jumped on the idea and bring their own bags when they go shopping.In conclusion, global warming has hazard to cause sea level rise and climate change: it leads to the extinction of plants and animals, while hinders peoples daily life and threatens human society. It also has few positive effects which leading people to focus on reuse, reduce, and recycle. Based on these negatives effects of global warming, I stressed that alleviating the effects of global warming is not a simple task. It calls for global concentration that every country takes action to preserve the earth ecosystem. This essay consequently addressed people requiring nurturing the consciousness to conserve the sources, enlightening people to preserve the planet. If people ca