Start with an acceptable exhaust stream? Water? That implies an O plus H
2 reaction, either internal combustion or fuel cell. Hydrogen comes in colors now -- green and blue.
Quote:
https://www.weforum.org › agenda › 2021 › 07 › clean-energy-green-hydrogen
Grey, blue, green - the many colours of hydrogen explained | World ...
27 Jul 2021Green hydrogen - also referred to as "clean hydrogen" - is produced by using clean energy from surplus renewable energy sources, such as solar or wind power, to split water into two hydrogen atoms and one oxygen atom through a process called electrolysis.
https://www.cnbc.com › 2022 › 01 › 06 › what-is-green-hydrogen-vs-blue-hydrogen-and-why-it-matters.html
What is green hydrogen vs. blue hydrogen and why it matters - CNBC
6 Jan 2022Green hydrogen could help us cut our carbon footprint, if it overcomes hurdles Blue hydrogen is hydrogen produced from natural gas with a process of steam methane reforming, where natural...
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This capitalistic nation you speak of: when and where? The United States prior to the Whiskey Rebellion? Galt's Gulch? Neom?