In our fight against global warming, the ocean plays a vital role as a carbon dioxide sink. It is believed that marine and terrestrial (e. g. forest) areas absorb approximately half of the CO
2 emissions caused by human activities (7.1 billion tons worldwide).
On the other hand, fisheries cause large amounts of CO
2 emissions in energy consumption among other production activities, and the carbon dioxide emission intensity of marine fisheries ranked 10th among all industries in 1990 (Center for Global Environmental Research, Independent Administrative Institution National Institute for Environmental Studies). This research aims to estimate the far reaching effects of reduced amounts of carbon dioxide discharged directly and indirectly by comprehensively evaluating CO
2 balance and reflecting the result in the input-output table, as in Fig. 1, which are designed to analyze the fisheries environment, in which CO
2 emissions from energy production are high.
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