本サイトで使用した図をまとめます。画像の詳細・解説は、リンク先の記事にあります。
![planterary-boundaries](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1010,h_1024/https://lenemas.com/wp-content/uploads/2022/03/planterary-boundaries-1010x1024.jpg)
Stockholm Resilience Centre, Planetary boundaries https://www.stockholmresilience.org/research/planetary-boundaries.html (accessed on 2022/03/08)
![clean-energy-transport-cost-efficiency](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1024,h_783/https://lenemas.com/wp-content/uploads/2022/03/clean-energy-transport-cost-efficiency-e1646381337227-1024x783.png)
IRENA, Geopolitics of the Energy Transformation The Hydrogen Factor, 2022.
![distances-from-japan](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1024,h_1024/https://lenemas.com/wp-content/uploads/2022/03/distances-from-japan-1024x1024.jpg)
教科の学習, "高校入試地理 地理1-6 正距方位図法 解説" https://www.toudounavi.com/2016/08/18/地理1-6-正距方位図法-解説/ (accessed on 2022/02/17)
![annual-co2-concentration-in-atmosphere](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1024,h_616/https://lenemas.com/wp-content/uploads/2022/02/CO2_emi_year-e1645517333896-1024x616.png)
Intergovernmental Panel on Climate Change (IPCC), The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change 2013.
![annual-carbon-dioxide-emission-by-region](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1024,h_723/https://lenemas.com/wp-content/uploads/2022/02/annual-co-emissions-by-region-1024x723.jpg)
Our World in Data, "CO2 emissions by region", https://ourworldindata.org/co2-emissions (accessed on 2022/02/21)
![gravimetric-energy-density](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1024,h_694/https://lenemas.com/wp-content/uploads/2022/03/gravimetric-energy-density-e1646784369236-1024x694.jpg)
U.S. Department of Energy, Material-based hydrogen storage, http://energy.gov/eere/fuelcells/materials-based-hydrogen-storage (accessed on 2021/03/25).
![earth-at-night](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1024,h_335/https://lenemas.com/wp-content/uploads/2022/02/EarthAtNight-e1643869267393-1024x335.jpg)
NASA, “Earth at Night”, https://earthobservatory.nasa.gov/features/NightLights (accessed on 2022/02/03)
![electricity-grid-EU](https://sp-ao.shortpixel.ai/client/to_webp,q_glossy,ret_img,w_1024,h_593/https://lenemas.com/wp-content/uploads/2022/02/EUGrid-e1643776221541-1024x593.jpg)
the European Network of Transmission System Operators for Electricity, "Grid Map", https://www.entsoe.eu/data/map/ (accessed on 2022/02/02)