[Smokin' Joe]

Nope. One shuttle launch does more Ozone Layer damage than if you had dumped every R-12 air conditioner on the planet.

[Gorzaloon]

Nope. One shuttle launch does more Ozone Layer damage than if you had dumped every R-12 air conditioner on the planet.

You are likely right. What do the ammonium perchlorate-laden Solid Rocket Booster weigh, each? And what comes out of them? Aluminum oxides, NOx's and chlorides.

[driftdiver]

Chlorine emissions from the Space Shuttle?

The main engines use Hydrogen and Oxygen. The SRBs burn a solid rocket propellant that is a mixture of powdered aluminum and ammonium perchlorate. The shuttle maneuvering engines use hydrazine with oxygen.

So where does the Chlorine come from?