Really, who gives a damn? Unless we are launching orbital flights at the rate we launch commercial airliners, emissions from rockets are a pisshole in the snow.

Really, who gives a damn? Unless we are launching orbital flights at the rate we launch commercial airliners, emissions from rockets are a pisshole in the snow. If we do ramp up to that kind of tempo, economics will spur on efficiency advances. Nipping progress in the bud now because it might be a problem some undefined period of time down the line is cowardly and depressing.