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Opencast mining contributes to the severe disturbance of vegetation and serious damage to the ecological environment. Scientific assessment of the ecological losses may provide guidance for the sustainable land use in mining areas. This study uses the Carnegie Ames Stanford Approach (CASA) model to estimate the net primary productivity (NPP) of vegetation in the Pingshuo mining area from 2006 to 2020 and uses statistical analysis and mathematical models to study the impact of mining and land reclamation on NPP. The results show that NPP decreased slowly at a rate of 0.809 gC/(m2·month) per year. In 2006, the urban area of Pinglu and the opencast coal mining area were located in the western part of the study area, while the eastern part was distributed with a large amount of grassland, forested and cultivated land, and the NPP showed a high pattern in the east and low in the west. With the continued eastward movement of Antaibao and Anjialing mining areas, as well as the construction and continuous westward expansion of the East opencast mine, the pits of all three opencast mines moved to a central location in 2020, changing the spatial distribution of NPP to high in the surroundings and low in the middle. The NPP within the three opencast mines decreased significantly, but the change in NPP increased from −7.34 gC/(m2·month) to 7.15 gC/(m2·month) as the reclamation area increased, indicating that mining increased ecological losses while land reclamation mitigated them. The variation of NPP within 600 m outside the mining area is 2.06~7.45 gC/(m2·month), and 0.11~1.00 gC/(m2·month) from 600 m to 1000 m, indicating that NPP is sensitive to the influence of mining. The results may provide guidance for further analysis of the impact of mining on local environments and exploration of more appropriate land reclamation measures. [ABSTRACT FROM AUTHOR]

Copyright of Landscape Architecture Frontiers is the property of Higher Education Press Limited Company and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Theoretical researchers and policy makers have been using both traditional production factors and relatively new production factors to explain the different growth rates in different countries and regions. However, as pollution becomes more serious, the ecological environment gradually becomes an important part of the national (regional) development strategy. Few scholars have laid their hands on energy and environmental factors in the study of China's economic growth. On the contrary, they have frequently considered physical and human capital accumulation as the main sources of China's economic growth. Thus, strong sustainability should attract more attention from researchers. This article attempts to shed light on the sources of China's economy from the perspective of strong sustainability. Employing a Cobb-Douglas production function, this paper introduces environment pollution, as a key natural capital, and energy consumption into the economic accounting framework. We also introduce government intervention, financial structure, industrial structure and degree of openness into the framework of total factor productivity to examine the effectiveness of the Chinese government's direct and indirect participation in the markets. Then, we use the long-term growth accounting equation of China to decompose its economic growth and to analyze the decomposition results dynamically. In addition, this paper analyzes the short-term change of China's economic growth by using a VAR model. The results revealed three facts. First, we find an inverted U-shaped relationship between the degree of openness and the industrial structure and their marginal growth effects, a U-shaped relationship between the financial structure and its marginal growth effect and a negative relationship between the government intervention and gross domestic product growth. Secondly, China's economic development approach was still extensive and unsustainable, and it should follow a model that relies more on total factor productivity and relies less on ecological factors. China's economic growth mainly depended on physical capital and energy consumption, and environment pollution was also a necessary byproduct of economic growth, however, the contribution of human capital and total factor productivity were small. Last but not the least, in the short term, the total factor productivity was an important source of China's economic growth. [ABSTRACT FROM AUTHOR]

Copyright of Journal of South China Normal University (Natural Science Edition) / Huanan Shifan Daxue Xuebao (Ziran Kexue Ban) is the property of Journal of South China Normal University (Natural Science Edition) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)