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nature : also known as life-cycle analysis. It was a product, process or activity, from the mining of raw materials to production, transportation, distribution, use, reuse, maintenance, recycling and final disposal, the so-called "cradle to the grave" of the entire life cycle of environmental load evaluation or analysis. LCA defined as : summary and evaluation of a product (or service) system throughout its life during the week of all inputs and outputs to the environment and the potential impact on the way; Also defined as : energy, raw material consumption and waste emissions are identified and quantified to evaluate a product of the process activities on the environment or the burden of objective measures. The international environmental management standard ISO14040 series-ISO14049 is the LCA, we can see LCA is an important environmental management tools. LCA is in the development stage, the method was not ripe yet, the general product life cycle divided into pre-production, production, sales, use, disposal stage 5, respectively belonging to the field of the environment such as solid waste, pollution and soil degradation, water pollution, air pollution, energy consumption, the consumption of resources, noise, effects on the ecosystem shows the list of inputs and outputs; according to the pollution levels, the establishment of model quantified, and impact analysis and evaluation of the results should be made to improve measures to find a reasonable, economic and effective method to reduce environmental risk and enhance the competitiveness of products and realize the value of the business objectives.
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