本期专题：低碳城市再聚焦--问题与措施--城市建设与碳排放的若干重要关系

Critical Relations of City Construction and Carbon Emission

在中国，城市化会是今后20—30年经济发展的主要动力．但过腰建设拉动两高一资严业．从而使我国碳排放扶摇直上．乃是我国低碳经济最大的问题。遏制城市建设中无谓的碳排放．是中国低碳城市建设的关键。由此产生三个值得关注的领域：其一，如何做到合理而不是过度估算城市规划中的人口规模；其二。怎样避免因城市规划和决策的不当而导致高碳的生活方式：最后，如何在采用城市建设中的低碳技术时避免在生命周期视野中事实上的高碳的选择。

Urbanization is the main driving force of China＇s economic growth for the next 20-30 years. However, because of the fact that the overinvestment in construction fields stimulates the growth of those heavy energy consumption, heavy pollution and resource related industries, China＇s carbon emissions skyrockets, which is becoming the biggest challenge of China＇s low carbon economy. How to control those unnecessary carbon emissions in city constructions is the key point of the low carbon city development. Thus there are three fields worth of concern： first, how to reasonably estimate the size of city population in the process of planning; second, how to avoid improper urban planning and decision-making which lead to high carbon lifestyle;finally, during urban construction, how to avoid the using of superficial low-carbon technologies which are in fact of high carbon emission in the life cycle perspective.