隨著全球溫度的不斷上升，伴隨著各種的氣候災難。聯合國（UN）以及各國紛紛開始制定政策及一連串相關的減碳措施，以減緩溫室氣體的排放，台灣身為出口導向的國家，針對各國提出針對氣候變遷制定的條款須更謹慎，以確保商品能順利且在碳排放標準內順利出口。因此，本研究針對台灣農產品中之芭樂進行碳足跡分析，並計算碳排放，確認排放熱點，作為未來台灣農產品出口時碳足跡盤查的參考。研究結果顯示，芭樂生命週期碳足跡為1.0623 CO2e/Kg，各階段碳排放依序為:生產階段(0.1774 CO2e/Kg)，包裝階段(0.0591 CO2e/Kg)，運輸階段(0.0826 CO2e/Kg)。對於芭樂整體碳足跡排放的影響，若將運輸工具置換成混和動力車，整體碳足跡將下降至0.2544 CO2e/Kg，運輸階段占整體碳排放量的7.2%;將運輸工具換成天然氣燃料車，碳足跡則為0.2552 CO2e/Kg，運輸階段占整體碳排放量的7.35%，使用電池燃料車，因運輸階段不排放， 因此運輸階段占整體碳排放量的0%; 若考量運輸工具製造及回收階段的整體碳足跡，計算後，使用電池燃料車作為芭樂運輸工具的芭樂生命碳足跡放量為0.2414 CO2e/Kg運輸階段佔整體芭樂碳排放的2.03%。本研究建議，使用電池燃料車相較目前之柴油貨車，整體碳排放下降24.30%，整體碳排放下降最多。

As global temperatures continue to rise, various climate disasters will occur. The United Nations (UN) and various countries have begun to formulate policies and a series of related carbon reduction measures to slow down greenhouse gas emissions. As an export-oriented country, Taiwan must be more cautious in the provisions proposed by countries on climate change to ensure that products can Export smoothly and within carbon emission standards. Therefore, this study conducts a carbon footprint analysis on guava of Taiwan's agricultural products, calculates carbon emissions, and identifies emission hotspots as a reference for carbon footprint inventory when exporting Taiwan's agricultural products in the future. Research results show that Guava’s life cycle carbon footprint is 1.0623CO2e/Kg, and the carbon emissions at each stage are: production stage (0.1774CO2e/Kg), packaging stage (0.0591CO2e/Kg), and transportation stage (0.0826CO2e/Kg) . Regarding the overall carbon footprint impact of guava, considering the replacement of transportation vehicles with different options, shows the following results: If hybrid vehicles are used, the overall carbon footprint decreases to 0.2544CO2e/Kg, with the transportation phase accounting for 7.2% of total carbon emissions. If natural gas vehicles are used, the carbon footprint is 0.2552CO2e/Kg, with the transportation phase contributing 7.35% to total carbon emissions. Battery-powered vehicles do not emit during the transportation phase, resulting in this phase contributing 0% to total carbon emissions.When considering the entire life cycle including vehicle manufacturing and recycling stages, the guava's life cycle carbon footprint when transported using battery-powered vehicles is 0.2414CO2e/Kg, with the transportation phase accounting for 2.03% of total guava carbon emissions. This study suggests that using battery-powered vehicles reduces the overall carbon emissions of guava transportation by 24.30% compared to current diesel trucks, making it the most effective option for reducing overall carbon emissions.

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