Greta lookin' like she is about ready to strap on a suicide vest

[Cuddles]

Some of them use methane, kerosene, etc.

Most rockets don't run on hydrocarbons. Certainly not space flight ones

What do they run on?

https://letmegooglethat.com/?q=rocket+fuel

 

[ipatent]

https://letmegooglethat.com/?q=rocket+fuel

https://en.wikipedia.org/wiki/Rocket_propellant

 

[Overnight]

https://en.wikipedia.org/wiki/Rocket_propellant

Well, that's brilliant! Why don't we run the world on these non-HC fuels! Greta would be pleased as punch!

 

[ipatent]

Methane and Kerosene are hydrocarbons.

 

[Cuddles]

https://en.wikipedia.org/wiki/Rocket_propellant

methane is pretty much experimental and has hardly been used yet (likely to change due to planetary sourcing). I'll give you kerozene for 1st staging of a few big rockets.

https://en.wikipedia.org/wiki/RP-1