Michele Lancia , Yingying Yao , Charles B. Andrews , Xiaoli Wang , Xingxing Kuang , Jinren Ni , Steven M. Gorelick , Bridget R. Scanlon , Yanxin Wang , Chunmiao Zheng
{"title":"The China groundwater crisis: A mechanistic analysis with implications for global sustainability","authors":"Michele Lancia , Yingying Yao , Charles B. Andrews , Xiaoli Wang , Xingxing Kuang , Jinren Ni , Steven M. Gorelick , Bridget R. Scanlon , Yanxin Wang , Chunmiao Zheng","doi":"10.1016/j.horiz.2022.100042","DOIUrl":"10.1016/j.horiz.2022.100042","url":null,"abstract":"<div><p>Over the past several decades, China has rapidly depleted groundwater storage, and has lagged in managing and protecting this resource. As a result, dried up rivers, land subsidence, saltwater intrusion, and wetland losses are extensive. To assist with managing this vital groundwater resource, we constructed the first national-scale numerical groundwater flow model of China to provide a comprehensive overview and understanding of the subsurface flow dynamics. The groundwater model is three-dimensional with a 10 km by 10 km horizontal resolution and five discretized vertical layers (up to 1700 m below the land surface). The calibrated model matched calculated to observed water levels and sufficiently reproduced water budgets. The model was used to reconstruct groundwater depletion by retracing the different stages of Chinese economic development. From 1945 to 2020, the northern provinces are characterized by an average groundwater depletion of ∼16.7 km<sup>3</sup>/yr (equivalent to 30% of the Yellow River's annual flow) while southern China has experienced no substantial groundwater depletion. Groundwater depletion is consistent with a large observed reduction in groundwater discharge as baseflow to the Yellow River (-23%) relative to negligible variation in baseflow in the Yangtze River. Our study provides a holistic tool to support development of nationwide water management strategies and temper the effects of a future water crisis that China's growing economy could propagate at the global scale.</p></div>","PeriodicalId":101199,"journal":{"name":"Sustainable Horizons","volume":"4 ","pages":"Article 100042"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772737822000360/pdfft?md5=c304e5b41d8e10742d35d2a1472b0fe9&pid=1-s2.0-S2772737822000360-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80028577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Three-child policy for sustainable population in China","authors":"Lan Song , Mindai Wang","doi":"10.1016/j.horiz.2022.100046","DOIUrl":"10.1016/j.horiz.2022.100046","url":null,"abstract":"","PeriodicalId":101199,"journal":{"name":"Sustainable Horizons","volume":"4 ","pages":"Article 100046"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772737822000402/pdfft?md5=7cc96b354d7b6a7c27f1c503d7a3eb23&pid=1-s2.0-S2772737822000402-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73150029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nor Hazlina Md Khairi, Yutaro Akimoto, Keiichi Okajima
{"title":"Suitability of rooftop solar photovoltaic at educational building towards energy sustainability in Malaysia","authors":"Nor Hazlina Md Khairi, Yutaro Akimoto, Keiichi Okajima","doi":"10.1016/j.horiz.2022.100032","DOIUrl":"10.1016/j.horiz.2022.100032","url":null,"abstract":"<div><p>To maintain the sustainability of the country's energy resources and less carbon, the Malaysian Government has set several strategies for achieving this target. One of them is using renewable energy (RE) sources. Solar energy is one of the most prospective sources because it is abundant and easy to implement. With increased interest and existing limitations, the application of rooftop solar photovoltaic (PV) systems is experiencing a significant increase as an alternative energy provider in Malaysia. However, further investigation is necessary to explore the suitability of rooftop solar PV based on its potential. The present work studies the potential of installing solar PV on the rooftop of educational buildings with various roof tilted angles. To this end, results show that the potential PV generation is significantly high even for small rooftop areas at certain education buildings and can accommodate the institute's energy load demand. Positive high savings for energy and electricity bills also show that installing rooftop solar PV benefits education institutes. Emission savings could reach approximately 26,260 tCO<sub>2</sub> or 21,358 tCO<sub>2</sub> annually for c-Si and mc-Si, respectively. These results show that rooftop solar PV can be suitable for an educational building. This study also could be used as support information by the decision maker and education institution administration in implementing solar PV to achieve national aspiration toward energy sustainability and, simultaneously, decarbonise the energy supply.</p></div>","PeriodicalId":101199,"journal":{"name":"Sustainable Horizons","volume":"4 ","pages":"Article 100032"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772737822000268/pdfft?md5=2469ecb6ca477ee78511a70b61bff425&pid=1-s2.0-S2772737822000268-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76384010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Urine source separation-based pretreatment: A sustainable strategy for improving methane production from anaerobic digestion of waste activated sludge","authors":"Lixin Tian, Haixiao Guo, Yufen Wang, Xiaomin Wang, Tingting Zhu, Yiwen Liu","doi":"10.1016/j.horiz.2022.100043","DOIUrl":"10.1016/j.horiz.2022.100043","url":null,"abstract":"<div><p>Urine wastewater derived from source separation technology was employed to pretreat waste activated sludge (WAS) for anaerobic digestion in this study. In comparison to the control group, cumulative methane production was identified to be improved by 23% after pretreated by urine wastewater with its volumetric proportion of 1:8. Urea and hydrolyzed free ammonia (FA) in urine wastewater were observed to pose a synergistic effect on sludge disintegration, benefiting the reduction of sludge volume and enrichment of available substrates for bio-processes. Analysis of microbial community further revealed that acid-producing microbes were enriched in the experimental digesters. Although FA was found to be the major inhibitor to several microbial stages, metal ions supplemented by urine pretreatment might have alleviated such suppression. The proposed strategy would pave a more sustainable way for sludge pretreatment with waste materials.</p></div>","PeriodicalId":101199,"journal":{"name":"Sustainable Horizons","volume":"4 ","pages":"Article 100043"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772737822000372/pdfft?md5=66450f0b972b40f7be49c29c6c467149&pid=1-s2.0-S2772737822000372-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87000623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An expert-based evaluation on end-of-life solar photovoltaic management: An application of Fuzzy Delphi Technique","authors":"Daniel Oteng, Jian Zuo, Ehsan Sharifi","doi":"10.1016/j.horiz.2022.100036","DOIUrl":"10.1016/j.horiz.2022.100036","url":null,"abstract":"<div><p>The implementation of solar photovoltaic (PV) waste management options is of concern to international bodies, policymakers, and communities as it is not only related to life cycle environmental impacts but the preparation of a long-term plan and its successful implementation. There are insufficient options in Australia when it comes to the appropriate management of hazardous materials from solar PV waste. This study investigates the management of end-of-life (EoL) PV waste in Australia. A modified Fuzzy Delphi Method (FDM) is adopted in gathering data through interviews and questionnaires from experts in the field. The FDM analysis revealed the results showing the decisions made by the experts. The results show that, crystalline silicon panels were the most common panels on the Australian market and the ones that are being installed frequently. On policies, although the Australian government has banned PV waste from going to landfill since 2014, there were no regulations or action plans to manage PV waste. The absence of policies and regulations results in unregulated movement and tracking of solar PV waste in and out of Australia as well as within and across the states. The extent of the PV recovery and recycling is still under investigation. Moreover, infrastructure and logistics has been a significant problem because of the geographical spread of the country and how it affects transportation and the supply chain. Findings led to the establishment of a conceptual framework for the current treatment of solar PV waste in Australia.</p></div>","PeriodicalId":101199,"journal":{"name":"Sustainable Horizons","volume":"4 ","pages":"Article 100036"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277273782200030X/pdfft?md5=8716e611a4f14f3ba5c3005e456bb8f4&pid=1-s2.0-S277273782200030X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79453908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Emerging Technological Frameworks for the Sustainable Agriculture and Environmental Management","authors":"Bhupendra Chaudhary , Vijay Kumar","doi":"10.1016/j.horiz.2022.100026","DOIUrl":"10.1016/j.horiz.2022.100026","url":null,"abstract":"<div><p>The global human population is constantly increasing whereas the agricultural land resources are declining for reasons of urban settlements and industrial growth. This has certainly strained the agricultural sector for increased annual yields, especially under the changing climate. To accomplish the rising demand of consumers’ for food, feed and fiber, up to 70% upsurge in the crop production is farsighted by 2050. For this purpose, the accessible resources of the modern agriculture have been harnessed mainly through conventional genetics approaches in the past decades. Presently, the advent of state-of-the-art biotechnologies is addressing such field challenges for continuous ‘agricultural success’. Here, we deliberate about the resourceful agricultural practices by the durable alliance of <em>i)</em> molecular breeding, genetic-engineering (GE) and gene-editing technologies for increased crop yields and decreased biotic/abiotic stress-mediated agricultural losses, and <em>ii)</em> environment resilience including solutions to make all aspects of our lives sustainable. We also provide an overview of the ecological affability of engineered crop events worldwide; and also the deployment of biotechnology methodologies to address challenges in the sustainability of renewable resources including biomass to biofuel, and bioremediation processes. Further, the integration of artificial intelligence (AI) and machine learning (ML)-empowered solutions to crop challenges is revolutionizing the prevailing agri-resources and providing a roadmap to the next-generation crop management and environment resilience. In order to enhance the agricultural production under continuously changing climate, and to achieve the environmental sustainability goals, various technological field-innovations have been discussed, and research gaps are identified for future research developments.</p></div>","PeriodicalId":101199,"journal":{"name":"Sustainable Horizons","volume":"3 ","pages":"Article 100026"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772737822000219/pdfft?md5=7ce24454b6c811153c43633f6a3218ce&pid=1-s2.0-S2772737822000219-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75435581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ana Paula Paulinetti , Isabela Mehi Gaspari Augusto , Lia Paula Poloni Batista , Arthur Gregorio Barbosa Tavares , Roberta Albanez , Suzana Maria Ratusznei , Giovanna Lovato , José Alberto Domingues Rodrigues
{"title":"Anaerobic digestion as a core process for sustainable energy production in the soybean biorefinery: A techno‐economic assessment","authors":"Ana Paula Paulinetti , Isabela Mehi Gaspari Augusto , Lia Paula Poloni Batista , Arthur Gregorio Barbosa Tavares , Roberta Albanez , Suzana Maria Ratusznei , Giovanna Lovato , José Alberto Domingues Rodrigues","doi":"10.1016/j.horiz.2022.100024","DOIUrl":"10.1016/j.horiz.2022.100024","url":null,"abstract":"<div><p>With the ever-growing environmental concern about natural resources depletion and the search for alternative energy sources, anaerobic digestion technology emerges as a core process in biorefineries. One of the limiting factors for full-scale use of this process is the scarcity of studies that technically and economically evaluate more flexible and unconventional technologies, such as Anaerobic Sequencing Batch Biofilm Reactors (AnSBBR) with immobilized biomass. Therefore, this paper carried out a techno-economic evaluation regarding the implementation of AnSBBR reactors, on an industrial scale, in the treatment of soybean molasses and glycerin. The assessment was based on the best published results presented by this type of reactor on a laboratory scale. The scale-up estimate resulted in a configuration of 8 AnSBBR reactors with 1000 m³ each in the treatment of 59 tons-molasses⋅day<sup>−1</sup>. The energy produced by this system could reach 18.6 GWh⋅year<sup>−1</sup> and would have an initial investment of USD 7.6 million with an annual return of USD 2.2 million. On treating 17 tons-glycerin⋅day<sup>−1</sup>, the estimate resulted in a configuration of 6 AnSBBR reactors with 900 m³ each. The energy produced could reach 6.3 GWh⋅year<sup>−1</sup> and would have an initial investment of USD 5.8 million with an annual return of USD 1 million.</p></div>","PeriodicalId":101199,"journal":{"name":"Sustainable Horizons","volume":"3 ","pages":"Article 100024"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772737822000190/pdfft?md5=d3a0609daefefb40c4ccca67b1366f35&pid=1-s2.0-S2772737822000190-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81952398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nairong Tan, Xiaolei Wang, Hao Wang, Zhuoqun Gao, Xiaoying Chang, Tao Ma
{"title":"Downscaling of planetary boundaries and sustainability management: A nexus analysis of water, land and major functions at the national-provincial level","authors":"Nairong Tan, Xiaolei Wang, Hao Wang, Zhuoqun Gao, Xiaoying Chang, Tao Ma","doi":"10.1016/j.horiz.2022.100028","DOIUrl":"10.1016/j.horiz.2022.100028","url":null,"abstract":"<div><p>This study introduces planetary boundaries as a global sustainability benchmark to expand the evaluation of the major function zoning. We established the relationship between the resource boundaries and China's sustainability management system while calculating the national and provincial indicators of land and water boundaries and major functions. The results showed that the efficiency of land resources was related to the distribution of forest, grassland, and wetland ecosystems; the efficiency of water resources was related to the basin and economic distribution. Linear downscaling methods are less applicable and effective in studies of planetary boundaries. The provincial water and land boundary are not consistent with the top-down decomposition results of planetary boundaries. The spatial mismatch between regional development and population will lead to the overexploitation of national resources and the environment. For basin regions rich in water resources and biome regions rich in ecological resources, the boundary threshold should be increased for major function clustering based on efficiency advantages. For main agricultural production zones and key ecological function zones beyond the water boundary, water allocation should reduce industrial and residential water use, and improve agricultural and ecological water efficiency to ensure food security and ecological safety. For optimization development zones, industrial transfer to the surrounding areas would optimize the industrial water structure and reduce virtual water consumption.</p></div>","PeriodicalId":101199,"journal":{"name":"Sustainable Horizons","volume":"3 ","pages":"Article 100028"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772737822000232/pdfft?md5=c6239bc9746b1cf5b7c5687e83b312ba&pid=1-s2.0-S2772737822000232-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88609149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}