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For animals who fed by human, it may also has substance which will bad for the health for human. Recently, the frequent food safety crises in China, such as dioxin, sudan red, melamine, waste oil, lean meat powder, and staining steamed buns, etc. have involved a wide varieties of food and had strong hazardness, which has made people doubt that "what can we eat now in China?"(Shu-rong 2011).Another terrible influence is farm animal may improve the air pollution. The report showed that eating meat produces more global warming than driving. While transport is responsible for 13% of climate gases, agriculture is responsible for 18%.(Korthals,2011,pp.625-629)In summary, meat eating may bad for people’s health and environment, especially the green house effect of pollution. In conclusion, vegetarian diet will more healthy, easy to weight loss, and good for health. Other benefits including high protein and lower risk of disease are also significant for vegetarian diet. Thus meat is not necessary for daily meals, the food needs of the meat can be substitute for other food
