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.
Yes, burning poop can release toxic fumes and particles that are harmful to inhale.
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.
Very toxic. Do not inhale, it deplets the oxygen.
Your local Poison Control Centre (US/AE, Center) should have information on file about household chemicals and any known or associated toxicity.
All animals are affected by toxic chemicals.
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.
There are too many to name. Assume all chemicals in lab are toxic.
No. Methane is toxic to inhale and very flammable.
Because whatever a pregnant woman eat, drink or inhale goes tight to the unborn baby. And unborn babies are really sensitive to some chemicals and can be badly damaged by their mother using them.
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.
Toxity