Relationship between Self-sufficiency Rate of Food and CO2 Emission in Japan

概要

論文の詳細を見る
LCA inventory data based on input-output tables was used to analyze the relationship between the self-sufficiency rate of food and CO2 emission in Japan. For food item i with the total consumption Ci [M\] and self-sufficiency rate xi, the total amount of CO2 emission is composed of (1) domestic production of i, (2) production of industrial product j to be exported for the import of i, and (3) transportation to export j and import i. According to this model, an effective carbon emission coefficient, σeff, i, j, was calculated for food item i by assuming the industrial item j to be exported. Then, σeff, i, jwas averaged among j proportionally to their amount of annual export statistics and the effective carbon emission coefficient σeff, i was calculated for each food item. Because of the low self-sufficiency rate of food (-40%), the amount of carbon emission was proved to have substantially increased in Japan. The self-sufficiency rate of food based on C-emission is only 13.6% in Japan. The difference between the present C-emission and that by assuming 100% food self-sufficiency easily reached the goal to reduce CO2 emission by COP3. This means that an increase in food self-sufficiency rate can be an effective option to reduce CO2 emission in Japan.
日本食品工学会の論文