[onion2k]

A SpaceX launch outputs 336,552KG of CO2. I imagine Blue Origin's first passenger flight will be a bit less because it's not going as high.

The environmental cost of doing anything is far from ideal, but in the case of space tourism the impact is minimal. A 777-300 flight from New York to London outputs about 1,261KG of CO2 per passenger.[1] In British Airways configuration there are 299 seats on a plane like that, which is 377,039KG in total. There are 28 direct NY-LDN flights daily.

If the goal is to reduce the amount of high atmosphere CO2 then persuading 300 fewer people to fly across the Atlantic would have a larger impact.

It's also worth pointing out that Jeff Bezos owns two Gulfstream G650ER private jets, which will be putting a lot more CO2 in to the atmosphere than his day trip to space.

[1] From https://www.atmosfair.de/en/offset/flight/

EDIT: It turns out that Blue Origin's rocket exhaust is water, so all the CO2 is retained at ground level. I guess that's good news.

[morsch]

As a side note: Stratospheric/high-altitude water vapor is probably also a contributor to global warming.