https://journals.tultech.eu/index.php/eil <p style="font-weight: 400;"><strong>Environmental Industry Letters (EIL)</strong> is an innovative open-access journal that sits at the intersection of environmental science and industrial development. Our mission is to offer a unique perspective on the mutually beneficial relationship between industries and the environment and, hence, promote practical and sustainable approaches to their coexistence. EIL maintains a global perspective, addressing the diverse needs and challenges faced by industries across developed and developing nations. The journal distinguishes itself by introducing fresh viewpoints into the scientific discourse, enriching our understanding of the intricate connection between industry and the environment.</p> <p style="font-weight: 400;"> </p> TULTECH en-US Environmental Industry Letters 2806-2965 https://journals.tultech.eu/index.php/eil/article/view/462 <p>This study presents an innovative approach to optimizing dynamic pricing strategies for ride-hailing services, focusing on Bolt’s operations in Málaga, Spain. Leveraging mathematical modeling and real-time data analysis, the research evaluates Bolt's pricing strategies to enhance competitiveness, especially in tourist-dense regions. The proposed model integrates demand-supply dynamics, temporal factors, and location-based considerations to ensure balance between affordability for customers and profitability for drivers. Additionally, the study emphasizes the importance of accessible and reliable pricing, tailored to the expectations of international tourists accustomed to using ride-hailing platforms in their home countries. The findings highlight the interplay between pricing strategies and customer retention, highlighting how Bolt can leverage adaptive pricing models to outperform traditional taxis and competitors like Uber. The research underscores the significance of aligning pricing strategies with market conditions, tourist demands, and operational challenges unique to Málaga’s seasonal fluctuations. By implementing these strategies, Bolt can optimize its market performance, ensure sustainable growth, and reinforce customer loyalty in competitive urban mobility landscapes.</p> Sina Attari Copyright (c) 2025 Authors https://creativecommons.org/licenses/by/4.0 2025-11-17 2025-11-17 3 2 38 58 https://journals.tultech.eu/index.php/eil/article/view/611 <p>The increasing complexity of environmental and societal challenges necessitates the development of comprehensive and quantitative frameworks for sustainable chemistry assessment. Traditional approaches such as green chemistry and Circular Chemistry primarily emphasize efficiency and resource circulation but often lack integration of social, economic, and system-level dimensions. In this study, a quantitative evaluation framework based on Safe-and-Sustainable-by-Design (SSbD) principles is developed to compare the sustainability performance of five chemistry paradigms across eight dimensions, including environmental, social, economic, systems thinking, circularity, safety, sufficiency, and life-cycle considerations. A multi-dashboard computational model is implemented in MATLAB 2019b to visualize framework performance and structural relationships. Sensitivity analysis is conducted to evaluate the influence of dimension weighting on composite sustainability scores, while Monte Carlo simulation (N = 10,000) is applied to assess uncertainty and robustness. Results indicate that SSbD and Sustainable Chemistry consistently outperform traditional frameworks, with higher composite scores (~0.78–0.85) and lower sensitivity to parameter variation. Furthermore, SSbD demonstrates strong alignment with safety and life-cycle priorities, while maintaining robustness under uncertainty. The findings highlight the importance of integrating multiple sustainability strategies and provide a quantitative decision-support tool for advancing sustainable chemical design.</p> Ghazal Golalizadeh Mostafa Abotaleb Enio Deneko Copyright (c) 2025 Authors https://creativecommons.org/licenses/by/4.0 2025-12-11 2025-12-11 3 2 59 67