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    3 . Over-reliance on the land operation. Local governments eager to develop economic thinking is driven vigorously respected "in order to attract investment and preferential policies, excessive land requisition, not only led to the loss of arable land, green belt has been eroded, and caused by repetitive construction and investment on a huge waste. The same time, the park land imbalance is more prominent, on the one hand, many industrial park land index is a serious shortage of project land, companies lining up for admission; without the other hand, the development of slow industrial park land levy, built in circle instead still exist. Land use extensive land use resource-efficient low phenomenon is particularly prevalent and serious.
    4 . Industrial symbiosis associated weak. By the impact of early investment and the unpredictable nature of the enterprises in the park, the park in the choice of upstream and downstream enterprises in resource allocation has considerable latitude. Industrial Park to achieve a range of industrial clustering, but the effect was weak association intermediate goods transactions, in addition to the upstream and downstream firms, corporate little production cooperation, has not formed a relatively complete, with a high degree of pision of labor relations the development of eco-industrial chain, it is difficult to establish a substance park system - energy recycling network, making it difficult to form a realistic way to promote waste recycling.
    5 . Eco-innovation is difficult to achieve. The so-called eco-innovation through the ecological technology innovations, the formation of the system of green, ecological concepts change and continue to solve the ecological problems, and finally to an ecological value, economic value and social value of the new project was the successful application activities (Tangshan Mao et al, 2006). Incentive Enterprises within the zone of ecological innovation process, due to the lag of the ecological concepts, ecological innovations with uncertainty, ecological innovation difficult to achieve in the market driven by economic interests as the center. At present, the relevant laws and regulations are not sound enough, public participation mechanisms are not yet mature, enterprises lack of enthusiasm for reconstruction and construction of eco-industrial park.
    (二 ) Sustainable urban development issues triggered by traditional industrial park development
    1 . The urban environment is deteriorating. Disregard environmental the external diseconomies market mechanism in the one-sided pursuit of GDP fueling drives of various industrial parks without taking into account the environmental costs, the pollution transfer the pursuit of short-term interest investment behavior, the impact of economic and resource environment of harmony and unity . With the widening of the scale and degree of development of the park development due to the early stage of development of the park has not placed enough emphasis on environmental protection facilities planning, industrial waste and household waste emissions increases, comprehensive utilization of inadequate park widespread deterioration of water quality, solid waste and excessive noise pollution and other phenomena. In fact, the majority of our industrial park is basically no connotation solve the contradiction between development and environmental protection, has so far failed to total environmental capacity and actual development of enhanced environmental control, or the end of the traditional concept of environmental governance (吴松毅 , 2005)。
    2 . Resource supply and demand contradiction. Important city resource utilization and circulatory conditions, the degree of match between the resources with each other, the development and utilization of alternative resources for the sustainable development of cities. Industrial Park has a prototype of the industrial chain, but the park overall water consumption, energy consumption, land consumption, material consumption high, energy integration, integrated water and material integration benefits has not yet been fully reflected. The reality of the situation, on the one hand, the city water, land, natural resources, the increasing shortage; On the other hand, due to the improper use of resources or technology lags behind, resulting in inefficient resource utilization, carelessly wasted very common problem, the production of natural resources a serious departure from the value and ecological value. Quite a long time, my resources are overloaded critical state in population, with the increasing pressure of population growth and economic development of the demand for resources, may exceed the resource carrying limit.
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