Abstract
Responding to the increasing global need for environmental protection, a green port balances economic vibrancy with environmental protection. However, because exhaust emissions (e.g., CO2 or sulfide) are difficult to monitor around ports, data on such emissions are often incomplete, which hinders research on this topic. The present study aimed to fill this gap in this topic. To remedy this problem, this study formulated a new data envelopment analysis (DEA) method for collecting CO2 emissions data at their source. This method was applied to collect real-world operating data from a large container-handling company in Taiwan. Specifically, we provide a real example using a novel green energy index to account for undesirable outputs. Our main objective was to formulate two methods that combine: (1) data envelopment analysis based on a modified slack-based measure, and (2) a multi-choice goal programming approach. The contributions of this paper included the finding that rubber-tired gantry cranes are the greenest and should be used in ports. Finally, our findings aid port managers in selecting port equipment that provides the best balance between environmental protection and profitability.
Highlights
Accepted: 14 June 2021Environmental degradation and resource overconsumption are serious global problems, whereas sustainable development benefits both a country and its economy
The four most common types of cranes used in international commercial ports, both in general and by the prominent container-handling company in Taiwan in particular, are as follows: gantry cranes (GCs), rail-mounted gantry (RMG) cranes, rubber-tired gantry (RTG) cranes, and empty container handlers (ECHs)
The results indicated that the green performance ranking among the cranes differed little from 2018 to 2019, and that the efficiency value of three crane types
Summary
Environmental degradation and resource overconsumption are serious global problems, whereas sustainable development benefits both a country and its economy. Sustainability 2021, 13, 6801 intensive and a source of pollution To remedy this problem and to ensure sustainable development, the concept of a green port was formulated. Studies have aimed to assist port managers in formulating feasible policies from a macroscopic perspective that accounts for scaling effects and the balance between economic vibrancy and environmental protection. These studies have not considered the sources of environmental damage in and around ports (e.g., sources of CO2 emissions). In response to this gap in the literature, this study focused on the container-handling system, which is closely related to daily port operations.
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