- Brief history of rail speed progress: https://trid.trb.org/view/13670#:~:text=As%20early%20as%201854%2C%20trains,the%20stage%20coaches%20of%201840
- Zhiyu Zhang et al 2019 Int. J. Extrem. Manuf. 1 022001. Manufacturing technologies toward extreme precision. https://iopscience.iop.org/article/10.1088/2631-7990/ab1ff1
- Quartz Magazine. “Most coal-fired power plants in the US are nearing retirement age.” T. Woody. 12 March, 2013. https://qz.com/61423/coal-fired-power-plants-near-retirement/
- Reuters Special Investigation: Creaky U.S. Power Grid Threatens Progress on Renewables, EVs. https://www.reuters.com/investigates/special-report/usa-renewables-electric-grid/
- EIA information on power plants nationwide. https://www.eia.gov/tools/faqs/faq.php?id=65&t=2.
Information on the number of Energy Utilities operating in the United States. https://www.publicpower.org/system/files/documents/2018-Public-Power-Statistical-Report-Updated.pdf
Energy.gov information on the number of power lines in the U.S. http://energy.gov/articles/top-9-things-you-didnt-know-about-americas-power-grid - It takes Boeing approximately 27 days to make a 787 Dreamliner. https://www.postandcourier.com/business/pace-of-dreamliner-production-quickens-at-boeing-s-north-charleston/article_02b584ea-3384-11e8-a3d4-ff9ca36dc590.html
According to Budweiser and several sources, it takes Anheuser-Busch approximately 30 days to brew a bottle of beer. https://www.cnbc.com/2008/07/02/Brewing-the-King-of-Beers.html / https://thefederalist.com/2015/02/18/making-the-case-for-budweiser/