2/20    I don't breath grossly much air, but, I tend to notice my chest
        expand after taking a breath - what can be done about this?  I point
        this question to ppl like tom, or other pollution-conscious sodans.
        (i would like to know what exercises I can do to specifically keep my
        air from forcing my chest to bulge, or alternatively, training my
        muscles to tell me to stop breathing if the problem is I'm not noticing
        my lungs are full.
        \_ I suggest training with sealed plastic bags over your head.  Start
           with a large bag and make them progressively smaller while you
           increase the length of each training session.  Once you have fully
           mastered the advanced techniques, breathing won't be a problem for
           you anymore.  I promise.