The purpose of this study is to investigate the impact of the construction of ecological civilization demonstration areas (CECDA) on the carbon efficiency (CE) of resource-based cities (RCs) and to understand its mechanism. The CE indicator of 114 prefecture-level RCs in China was measured from 2004 to 2018 using the Slack Based Measure (SBM) model. We found that the index showed an o... https://www.cuttingedgecutleryco.shop/product-category/gun/