incremental, small-scale sustainable innovations or the support of rather fragmented sustainability initiatives. The challenges … sustainability data and available space, and how port authorities can develop circular business models …

. This study analyzed the sustainability reports of four business firms, each in four different countries, covering 2005 … delineated several key categories, there were variations among the four firms' sustainability reports, indicating a need for … global standards for comparative analysis. This study highlights the importance of sustainability, its effective measurement …