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Grasping the structure of the spatial associations in the energy–carbon emission efficiency (ECEE) of the transportation industry is of great importance for ensuring the green and sustainable development of the transportation industry. Based on the panel data on the transportation industry in 30 Chinese provinces from 2003 to 2017, this paper measures the provincial ECEE using the non-radial directional distance function (NDDF) and explores the structure of the spatial associations in ECEE and its influencing factors using social network analysis (SNA). The results show that (1) the average value of transportation ECEE in China is 0.34. The overall ECEE is relatively low and exhibits obvious spatial and temporal heterogeneity. (2) The network structure of the spatial associations for ECEE exhibit a hierarchical gradient characterized by density in the east and sparsity in the west, with provinces in the eastern and central regions, such as Henan, Zhejiang, and Fujian, possessing core leadership positions in the spatial transportation ECEE network. (3) The results of the block model show that the spatial ECEE network in the Chinese transportation industry has an obvious factional structure and that there are significant spatial associations among the blocks. Block 4, which contains several western provinces, exerts clear spatial spillover effects. (4) Regarding the factors affecting the formation of the spatial association network for ECEE, the differences in industrial structures, transportation energy structures, education levels, environmental regulations, and foreign direct investment among the provinces have positive and relatively significant effects on ECEE networks. The findings of this paper have theoretical and policy implications for integrating energy conservation and carbon emission reduction in China's transportation industry across regions. [Display omitted] • ECEE for energy-intensive industries is measured. • Spatial and temporal heterogeneity of ECEE is depicted. • The structure of ECEE spatial association network exhibits density in the east and sparsity in the west. • Henan, Zhejiang and Fujian possess the core leadership position in the spatial association network. • The driving factors of ECEE spatial association network are explored using QAP. [ABSTRACT FROM AUTHOR]

The North China Plain is the main producing area of winter wheat in China. Due to the relatively poor condition of water resources, the competition of water between industry and agriculture is fierce. The increasing shortage of water resources has led to serious overexploitation of groundwater in some areas. Agricultural development is faced with severe challenges. In order to ensure regional food security and sustainable winter wheat planting, 52 cities of North China Plain (NCP), in the following of the paper, use the shorted name NCP，were taken as research units to analyze the matching characteristics of agricultural water and land resources, so as to reveal the direction of irrigated agriculture development and winter wheat suitable planting layout considering their balance in future. The paper firstly analyzed the cultivated area determined by water resource and irrigation development by agricultural available water, and then pointed out the direction of water-suited planting layout of winter wheat. The results showed that: 1) the Gini coefficient showed an increasing trend, which indicated that the area of cultivated land and irrigation area supported by water resources have nearly reached the upper limit. The large-scale extension of both cultivated and irrigation area is impossible under the restriction of water. 2) The amount of agricultural available water resources per unit of effective irrigation area and the effective precipitation increased gradually from north to south in the NCP, but the spatial distribution of water requirement of winter wheat in its growth period changed in the opposite way. This indicated the poor spatiotemporal match between winter wheat planting and water resources, leading to the cost of spending more water to maintain wheat production. 3), The further development of irrigation and the water-suited planting of winter wheat should pay attention to the southern part of the plain with rich water (such as southern Henan Province, Jiangsu Province, Anhui Province, etc.) to ensure the regional agricultural development. That is of great significance to the regional sustainable development, water shortage alleviation and national grain safety. ● Restraining the irrigation area and winter wheat in NCP. ● Moderately development irrigation area in south of the NCP. ● Water-suited planting layout of Winter wheat. [ABSTRACT FROM AUTHOR]

At present, the air quality of most cities in Henan Province is seriously polluted. This will do great harm to people's health and the sustainable development of society. In order to solve this situation and improve the air quality of Henan Province, it is necessary to make effective forecast for the future air quality. After comprehensive consideration of various prediction models, combined with the characteristics of air quality, this paper selects the grey model as the research tool. In order to improve the prediction accuracy of the model, a compound accumulative grey model is proposed in this paper. It has been proved that the accuracy of this model is higher than that of other models. The study found that the concentration of SO 2 and NO 2 in 18 cities in Henan province will continue to decline, reaching the first-level standard. PM 2.5 and PM 10 concentrations in all cities still exceeded the standard, with some cities exceeding the standard seriously. In the future, the focus of air control in Henan Province should be on PM 2.5 and PM 10. The forecast results can provide reference for related departments. [ABSTRACT FROM AUTHOR]