sustainability Article Biogas Potential for Improved Sustainability in Guangzhou, China—A Study Focusing on Food Waste on Xiaoguwei Island Roozbeh Feiz 1 , Jonas Ammenberg 1 , Annika Björn 2, Yufang Guo 3,*, Magnus Karlsson 1, Yonghui Liu 3, Yuxian Liu 4, Laura Shizue Moriga Masuda 5, Alex Enrich-Prast 2, Harald Rohracher 6 , Kristina Trygg 6 , Sepehr Shakeri Yekta 2 and Fagen Zhang 3 1 Department of Management and Engineering, Division for Environmental Technology and Management, Linköping University, Linköping 58183, Sweden;
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[email protected] Received: 2 February 2019; Accepted: 7 March 2019; Published: 14 March 2019 Abstract: As a result of rapid development in China and the growth of megacities, large amounts of organic wastes are generated within relatively small areas.