well i have to agree that 2nd smoke kills faster than inhaling
1st hand smoke. but it is also not true to say that 2nd smokers do
not die faster than 1st hand smoker. The thing is, people tend to
puff ciggerates in a different way. Some do not inhale all the
smoke into their lungs. Some tend to smoke in open areas, which
decreases their chances of inhaling back their own smoke. See, our
lungs have anatomical dead space and physiological dead space. The
smokes which do not reach the lung stay in the oral cavity, trachea
and bronchus. Then the air we inhaled will be of the mixture
between oxygen and those smokes. Not to mention that passer-bys are
walking or doing some exercise that breathes in more air than the
smokers who are sitting down puffing. Good if the smokers will then
again inhale back their smoke. So, good luck for them. They contain
about more than 4000 chemicals, which is fatal. not forget to
mention that the tar (you know tar?the material that makes the road
looks black) is deposited along the airways. All the best for the
smokers again for getting a janitor to clean their airways (meaning
mouth, nasopharynx, oropharynx, laryngopharynz, trachea....) with
brush and disinfectant. Also, we have to take into consideration
genetic factors. Some people are more susceptible to diseases and
some are not.
i mean, try to talk to you employer or do something that will tell
him that you can't stand the smell. i think quit the job will be
the best solution because your health is more important. More so,
it is difficult to tell walking time bomb not to smoke or smoke in
other places. Let's say, if you really want to quite the job, tell
you employer about the things you are facing while on the mean
time, you have to be sure that you already got a job. MAybe they
will change . who knows. 
