Building an intelligent interface between plants and the environment is of paramount importance for real-time monitoring of the health status of plants, especially promising for high agricultural yield. Although the advancement of various sensors allows automated monitoring, developing a sustainable power supply for these electronic devices remains a formidable challenge. Herein, a waterproof and breathable triboelectric nanogenerator (WB-TENG) is designed based on poly­(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) nanofibers embedded with fluorinated carbon nanotubes (F-CNT) microspheres, which was realized by simultaneous electrospinning and electrospraying, respectively. Using carbon nanotubes (CNT) as the electrode, the WB-TENG shows micro-to-nano hierarchical porous structures and high electrostatic adhesion, exhibiting a high output power density of 330.6 μW cm–2, breathability, and hydrophobicity. Besides, the WB-TENG can be conformally self-attached to plant leaves without sacrificing the intrinsic physiological activities of plants, capable of harvesting typical environmental energy from wind and raindrops. Results demonstrate that the WB-TENG can serve as a sustainable power supply for a wireless plant sensor, enabling real-time monitoring of the health status of plants. This work realizes the concept of constructing a plant compatible TENG with environment adaptivity and energy scavenging ability, showing great potential in building a self-powered agriculture system.

Evaluating the sustainability risk level of public-private partnership (PPP) projects can reduce project risk incidents and achieve the sustainable development of the organization. However, the existing studies about PPP projects risk management mainly focus on exploring the impact of financial and revenue risks but ignore the sustainability risks, causing the concept of "sustainability" to be missing while evaluating the risk level of PPP projects. To evaluate the sustainability risk level and achieve the most important objective of providing a reference for the public and private sectors when making decisions on PPP project management, this paper constructs a factor system of sustainability risk of PPP projects based on an extensive literature review and develops a mathematical model based on the methods of fuzzy comprehensive evaluation model (FCEM) and failure mode, effects and criticality analysis (FMECA) for evaluating the sustainability risk level of PPP projects. In addition, this paper conducts computational experiment based on a questionnaire survey to verify the effectiveness and feasibility of this proposed model. The results suggest that this model is reasonable for evaluating the sustainability risk level of PPP projects. To our knowledge, this paper is the first study to evaluate the sustainability risk of PPP projects, which would not only enrich the theories of project risk management, but also serve as a reference for the public and private sectors for the sustainable planning and development.

This paper examines the concept of land attachment—a positive emotional relationship between a resettled farmer and his or her rural land—in the context of China’s rapid urbanization and the resultant huge number of resettled and landless farmers. It explores the nature of resettled farmers’ emotional relationships to rural land to reveal the kinds of land that are meaningful to famers’ lives, and the differences among different groups. The study’s conceptual framework was based on place attachment theory. Grounded theory was applied to analyze qualitative data obtained from in-depth interviews. The results show that land attachment can be divided into seven categories: landscape, lifestyle, land income, land rights, land rootedness, land culture, and villagers’ relationships. We also observed three categories of emotional relationships between resettled farmers and rural land: “reluctant to give up rural land and with land attachment”, “willing to give up rural land but with land attachment”, and “willing to give up rural land and without land attachment”. This study’s exploration of the concept of land attachment revealed that rural land is not merely an objective asset but that it also has a multidimensional existence, and may be the focus of subjective loss. The study also observed that it would be helpful to deepen understandings of the subjective loss experienced by resettled farmers as a result of land-requisition policies. Drawing from its findings, the paper concludes with suggestions supportive of the sustainable development of future policies and communities.

Xanthomonas citri subsp. citri (Xcc)