Volume 12 Number 5 (May 2021)

Article#	Title & Authors	Page
1330	Optimization Modeling of nFe⁰/Cu-PRB Design for Cr(VI) Removal from Groundwater by I. Maamoun, O. Falyouna, R. Eljamal, K. Bensaida, and O. Eljamal	131
1331	Design and Deployment of an IoT-Based Air Quality Monitoring System by Tuyen Phong Truong, Duy Thanh Nguyen, and Phong Vu Truong	139
1332	Sustainable Use of Natural Resources to Improve the Quality of Life in the Alto Palcazu Population Center, Iscozazin-Peru by Doris Esenarro, Ciro Rodriguez, Jennifer Arteaga, Godilia Garcia, and Fabiana Flores	146
1333	Water Footprint Assessment of Thai Banana Production by Cheerawit Rattanapan and Weerawat Ounsaneha	151
1334	Indicators for Sustainable Redevelopment of Cultural Landscapes — Huangpu Veterans Quarter in Taiwan by Kuo-Wei Hsu, Nai-Chia Chao, and Jhong-Ping Xie	157