[gruez]

depends on the rocket fuel. hydrogen or hydrazine doesn't produce co2 on combustion.

[PeterisP]

Still, you could burn that fuel in a power plant instead of e.g. natural gas, and that would offset much more CO2 than what you can shoot into space. It's just not an efficient use of energy, and any large quantities energy saved or not generated has a pretty direct impact on the CO2 that we could not produce.

[salmonfamine]

If we get to a world with hydrogen-fueled rockets, we'll probably have much bigger dreams than just carbon sequestration.

[philipkglass]

The Delta IV Heavy is already fueled purely with hydrogen:

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

[salmonfamine]

Well I’ll be a buttered biscuit