If significant amounts are inhaled or ingested then, most definitely, yes.
It is not toxic, extended inhalation can cause you to pass out if you do not have oxygen.
inhaled
Yes. Most oils should not be inhaled and the smoke or fumes from hot hydraulic fluid are not exceptions.
toxic gas which, when produced, can kill people if inhaled
A type of atmospheric hazard that can be poisonous or harmful. Gases and dusts may be toxic if inhaled.
No
it is inhaled injected and ingested.
crack
Quartz in fine particles can cause lung conditions when inhaled.
Yes, nitrogen dioxide is harmful. It is a pollutant which is toxic if inhaled.
Possibly, depending on the toxins inhaled.