Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!orion.oac.uci.edu!unogate!xing!rick
From: rick@xing (Richard Ottolini)
Newsgroups: sci.space.shuttle
Subject: Re: I need facts!
Message-ID: <1991Jun27.181529.8785@unocal.com>
Date: 27 Jun 91 18:15:29 GMT
References: <37330001@hpindwa.cup.hp.com>
Sender: news@unocal.com (USENET News)
Organization: Unocal Corporation
Lines: 13

In article <37330001@hpindwa.cup.hp.com> bobj@hpindwa.cup.hp.com (Bob Joslin) writes:
>I've heard that one shuttle launch causes 1/4 of 1% of the ozone to be
>destroyed.  This sounds like propaganda to me.  That's a lot of ozone,
>even if it is destroyed over a long period of time.

There must be a certain daily variance in the amount of ozone, but I don't
know the number.  It is possible this number is within the variance.
An analogy that prompts this comment is the ionosphere that varies in size
and location during the day.

The effect of fuel exhaust on the atmosphere was studied when the American SST
program was posulated and canceled in the 1970s.  They have some numbers, but
atmospheric science has progressed since then.