The research findings reveal that a greener policy comprising natural environment<br>seminars for executives, a commitment to environmental protection from senior managers, devising environmental protection of the Code of Practice, participation in government- subsidized natural environmental programs, and announcing a written environmental policy play a critical role not only in facilitating firms’ other capabilities (e.g., greener ships and suppliers) but also in enhancing the firms’ superior firm performance through environ- mental performance. This finding is consistent with previous studies (Lai et al. 2011). Greener ship capability depends not only on reducing emissions of GHG but also on<br>the building of new ships toward energy-saving and environmental protection concepts. Likewise, the greener suppliers capability depends on an excellent environmental supplier choice system that stresses how to be a greener supplier
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