Under the scenario of the complex external environment and internal structural changes in agricultural development, exploring the synergistic relationship between agricultural green efficiency ( AGE ) and agricultural economic resilience ( AER ) can offer a new path for fostering sustainable regional agricultural development. This paper fills the research gap in the interaction between efficiency and resilience in agriculture. We explore the synergistic mechanism of the two based on the perspective of sustainable development, providing a reference for constructing a synergistic theoretical system of AGE and AER. Moreover, we apply the Haken model to the field of the agricultural economy and scientifically evaluate the level of AGE and AER synergy in Northeast China from 2010 to 2020. Finally, we analyze the influencing factors of AGE and AER synergy in Northeast China from three dimensions: economic, social, and natural. The results show that AER is dominant in the AGE-AER synergistic system. The synergy level of AGE and AER in Northeast China is mainly in the higher and advanced synergy stages, with obvious spatio-temporal differences and insufficient inter-regional radiation effects. Social factors are the main factors of spatial differentiation of AGE and AER synergy.

Digital Road is the new direction of rural revitalization, and the digital economy empowers rural revitalization as a new driving force for the sustainable development of agriculture and rural areas. Currently, the studies on the digital economy and rural revitalization are focused on a certain dimension and lack research on the influence mechanism of the digital economy driving rural revitalization and their spatial effects under the same framework. Based on the panel data of 31 provinces in China from 2013 to 2021, the paper explores the influence mechanism of rural revitalization driven by the digital economy and their spatial spillover effects by using the benchmark regression model, intermediary effect model and spatial Durbin model, and draws the following conclusions: (1) Digital economy can significantly promote rural revitalization. (2) Digital economy can significantly promote the revitalization of rural areas by transforming industrial structure and rural entrepreneurship. (3) The development of the digital economy will significantly promote the revitalization of villages in the region and the level of rural revitalization in neighbouring areas. After the endogenous treatment and robustness test, the above conclusions remain valid.

No abstract

No abstract

Building construction consumes energy and materials. Even if the scientific community has developed two main voluntary protocols of building construction evaluation (BREAM and LEED), the authors argue that one of the main factors that could be incisive for a better environmental sustainability is to stimulate all possible initiatives, including the reuse of recyclable building materials, that currently, is a modest application. Based on this, the paper is organized in two parts. The first is an analysis of the Italian situation with regard to urban redevelopment and energy saving, considering the number of intiatives and costs handed out for each region. The second evaluates and proposes new insights on the basis of the obtained results.

No abstract

No abstract

Despite its economic importance, mining activity for aggregate production (sand, gravel and crushed stone), may lead to an over-exploitation of the natural environment. This paper aims to evaluate the needs of aggregates associated with urban plans for the municipalities of Cagliari, Tortolì and Sant'Antioco (Sardinia island, Italy), also identifying the potential for recycling of construction and demolition waste, in particular of concrete. The geographical position of Sardinia prevents trade of recycled aggregates, confirming that the whole needs of aggregates can economically be satisfied only by local products. In order to meet the demand for aggregates from building industry and infrastructures, the combined use of natural and recycled aggregates, although desirable (EU Parliament, 2008), is not really suitable. It was therefore proposed another way, based on keeping the levy of recycled aggregates closely linked to the implementation of urban plans through the introduction of a new parameter, the Aggregate Maximum (Fi-max).