中文摘要：

从人均和单位GDPCO2碳净排放角度，借鉴显示性比较优势理论，对我国4个直辖市2005--2011年人均和单位GDPCO2碳净排放状况及其之间的差异大小进行计算，采用一元线性回归模型对4个直辖市未来几年人均和单位GDPCO2排放趋势和差异大小变化进行了预测，针对造成4个直辖市目前CO2排放现状的成因进行分析，并提出了建议。

英文摘要：

This paper employed the reveal comparative advantage theory to compute on the status and difference value of carbon dioxide emission in the view of per capita and per GDP of China four municipalities between 2005 and 2011. It was also used linear regression model to predict the trends in the next five years of the four cities. The reasons of the status of Chinese four municipalities were analyzed and the conclusion and proposal were shown.