This paper uses Hebei`s 2010—2015 related data to establish a decoupling model of construction land use expansion and economic growth, which is employed to estimate the decoupling index of the entire province and 138 counties within Hebei province by using ESDA and GIS, discusses its spatial concentrating features and distribution rules, providing references to improve construction land use efficiency. The decoupling index is 0.05-0.97 in the entire province from 2010—2015, implying an expansive decoupling, 0.09-0.70 in the 138 counties also implying an expansive decoupling. The spatial concentrating rule of decoupling between county construction land use expansion and economic growth shows that HH LISA index is mainly spreading in Sanhe, Xianghe and Dachang, and four counties in eastern Xingtai city, LL LISA in nineteen counties in centralsouthern Hebei. The 138 counties are divided into three tiers based on the expansive decoupling types.

his paper, through setting up Tapio abjunction model,studies the abjunction relation between economy and carbon dioxide emission in Xinjiang during 1990-2010,analyzes its temporal evolution, by means of IPAT model and Structure Decomposition Analysis (SDA), discusses its drives from gross carbon emission and energy strength.The result indicates a weak abjunction and expansion connecting between economy and carbon dioxide emission.The major drive of carbon dioxide emission is scale effect. Technical innovation in decreasing carbon dioxide emission strength is a vital tool in abjunction between economy and carbon dioxide emission, but can not be regarded as the sole means in saving energy.