CHAPTER THREE Fig. 19: Half-livesSource: SW Infographics / Knowable Fig. 20: Plasma-Arc Smokeless Trash IncineratorSource: https://energy.mit.edu/news/turning-waste-into-clean-fuels/ Fig. 21: EROI Energy Returned on InvestmentSource: https://festkoerper-kernphysik.de/Weissbach_EROI_preprint.pdf Fig. 21-A: The EROI CliffSource: Energy Storage and Civilization (Palmer and Floyd, 2020) https://link.springer.com/book/10.1007/978-3-030-33093-4