We applied the Triple Ⅰ to inclusive environmental impact assessment of oil tankers. As a result, we found that double-hull tanker is a more beneficial system than single-hull tanker. Moreover we examined whether the Triple Ⅰ can be used for the cost benefit assessment which combined safety FSA and environmental FSA. As a result, Triple Ⅰ is effective as the index which combined safety FSA and environmental FSA.
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