1. 1) 環境省, “脱酸素ポータル”,
https://ondankataisaku.env.go.jp/carbon_neutral/topics/
20221018-topic-34.html.
2. 2) International Energy Agency, “World Energy Outlook 2020”, (2020).
3. 3) International Energy Agency, “Global EV Outlook 2018”, (2018).
4. 4) International Energy Agency, “Global EV Outlook 2021”, (2021).
5. 5) UNIFE, “New Dependable Rolling Stock for a More Sustainable, Intelligent and Comfortable Rail Transport in Europe”, http://www.roll2rail.eu/Page.aspx?CAT=DELIVERABLES&IdPage=45291e18-8d8f-4fd6-99f8-5d4b7a519b9c, (2016).