.

[CyberGus]

You're forgetting about the byproduct of Fusion. Helium. There is a lot of helium on earth right now, but it's a finite amount. Once we let it all go we have no way of making more, until we solve fusion. Think of your great great grand kids birthday parties! <end sarcasm>

Finally, a noble gas that will give me a squeaky voice and whiten my teeth

Sponsored

 

[JBee]

Nobodies ever called my gas "noble" before.

But seriously, I watched that clickbait Starship 2.0 utube the other day and they were showing how they could power Starship for the Mars mission, and said they'd take hydrogen with or batteries. They also thought they need to take a incineration toilet with... and I was thinking, dude, just use the rocket tank methane and oxygen in a methane fuel cell (we nearly bought one in the early 2000's already), and use all the biological waste in anaerobic digestion to make methane again. Oxidising methane with oxygen makes water and CO2. For Mars just harvest frozen water using waste heat from generation, grow food and plants, and digest all biomass for fuel. Power people and plant...as in equipment.