Only if you have unprotected sexual intercourse.
There are toxic chemicals that are hazardous to your health in each cigarette that you inhale when you smoke one.
Scientists sometimes work with toxic chemicals which would not be healthy to inhale. Of course, they take precautions. Most of the chemicals used by chemists are not so toxic that even a slight amount, accidentally inhaled, will harm their health, but there are some which are that toxic.
If you inhale them, they can kill you.
Very toxic. Do not inhale, it deplets the oxygen.
All animals are affected by toxic chemicals.
Your local Poison Control Centre (US/AE, Center) should have information on file about household chemicals and any known or associated toxicity.
The question is toxic to what. Not all chemicals which are toxic to humans are toxic to bacteria, and some chemicals which are toxic to bacteria are harmless to humans (which is why we can have antibiotics). There are chemicals (like Hydrogen Sulfide) which are very toxic to mammals that SOME bacteria eat as food. But there are other chemicals like chlorine which are toxic to both humans and bacteria. So the question does not have a simple answer.
There are too many to name. Assume all chemicals in lab are toxic.
Absolutely, almost all fumes produced from a factory or manufacturing facility are from toxic chemicals even from cleaning supplies. Do not inhale and limit your exposure as much as possible.
Chemicals found in supply closets are often exceedingly dangerous to inhale. Some chemicals can cause rapid and irreversible lung damage, while others can cause brain and other organ damage. Sometimes individuals inhale household chemicals in order to produce a 'high', but these chemicals are generally much more dangerous than even 'hard' street drugs. The toxic effects of solvents are inseparable from any psychoactive properties, and thus these chemicals should never be inhaled.
No. Methane is toxic to inhale and very flammable.
Green chemistry focuses on eliminating the use of toxic chemicals in chemistry without stifling.