Development of a new framework to identify pathways from socioeconomic development to environmental pollution

Socioeconomic development and environmental conservation are in perpetual conflict. Economic activities have affected the environment through a wide range of pathways (or processes). Understanding these pathways is paramount for accomplishing societal, environmental and economic sustainability. However, the underlying causal pathways from socioeconomic development to environmental pollution remain obscure. In this study, we developed a framework to reveal the causal pathways through which socioeconomic development affects environmental pollution. This framework was operationalized by linking macroscale and microscale economic activities to heavy metal pollution through pollution pathways. The direct, indirect and hidden causal pathways and effects through which socioeconomic development caused soil Cd, As, Pb, Hg and Cr pollution in the Pearl River Delta (PRD) of China from 2004 to 2014 were identified. Socioeconomic development caused the exacerbation of Cd, As, and Pb pollution mainly through agricultural and primary and secondary industrial activities and caused the reduction in Hg and Cr pollution primarily through secondary industrial activities. The contributions of industrial sources to Cd, As, Pb, Hg and Cr pollution were 72.7%, 78.6%, 80.7%, 82.4% and 70.3%, respectively. The difference in the impacts of socioeconomic development on heavy metal pollution hinges on the different effects of economic scale and structure and technology. Hg and Cr pollution was mainly caused by the strong effect of economic structure and technology, whereas the effect of the economic scale played a major role in Cd, As and Pb pollution. Our study can provide insights into socioeconomic development to ensure favorable environmental outcomes. (C) 2020 Elsevier Ltd. All rights reserved.