“…Topic #3 deals with the issue of emission, policy, pollutants, and cost; for example, emissions in ports [10,54,55], the environmental costs of port related emissions [56], carbon emission evaluation [57], Emission Control Areas (ECA) [58,59], and emission tax policy [10]. As Sislian et al [30] indicate, sustainable development in ports usually focuses on environmental issues. Topics #2, #5, and #7 indicate environmental issues in industry and port cities, such as the sustainable development of port cities/areas [60], environmental reform [49], environmental performance [61], environmental sustainability in seaports [46,62], environmental management systems [63], environmental risk perceptions [64], environmental management [65], and environmental efficiency [66].…”