No, but it might be comparable or better than airplanes. https://cleantechnica.com/2017/10/07/musks-suborbital-flights-likely-lower-carbon-not-actually-cheap-p

No, but it might be comparable or better than airplanes. https://cleantechnica.com/2017/10/07/musks-suborbital-flights-likely-lower-carbon-not-actually-cheap-pleasant/ https://cleantechnica.com/2017/10/07/musks-suborbital-flight... And for the moment, flights are nowhere near numerous enough to have any effect on CO2 levels.