Breathing

https://www.vox.com/2014/12/4/7332411/fart-flatulence
https://www.gov.uk/government/publications/hydrogen-sulphide-properties-incident-management-and-toxicology/hydrogen-sulphide-toxicological-overview#:~:text=Exposure%20to%20high%20concentrations%20of%20hydrogen%20sulphide%20can%20cause%20collapse,terminated%20(2%2C%209).
https://emedicine.medscape.com/article/771194-clinical
https://www.menningerclinic.org/news-resources/vaping-teens-are-dying-to-be-cool
https://www.bbc.co.uk/programmes/p0khnns8#:~:text=Combining%20cleaning%20products%20to%20shift%20stubborn%20dirt,to%20respiratory%20damage%2C%20burns%20and%20even%20death.
https://www.icliniq.com/articles/respiratory-health/pesticides-and-asthma
https://www.healthline.com/health/sniffing-glue#:~:text=This%20damage%20can%20cause%20long,lead%20to%20fatal%20heart%20failure.
https://www.sciencedirect.com/topics/medicine-and-dentistry/cyanide#:~:text=Cyanide%20compounds%20are%20used%20in,h%20%5B7%2C15%5D.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5380556/
https://www.cdc.gov/niosh/ershdb/emergencyresponsecard_29750033.html#:~:text=CAS%20%23:,or%20liquid%20spray%20(aerosol).
https://www.researchgate.net/publication/387756141_Anaesthetic_Gases_Mechanisms_Clinical_Use_and_Safety_Considerations#:~:text=Inhaled%20anesthetics%20exert%20their%20effects,Inhibition%20of%20Excitatory%20Neurotransmission%3A%20These
https://www.poison.org/articles/how-dangerous-is-pepper-spray-201#:~:text=Pepper%20spray%20causes%20irritation%20of%20the%20eyes%2C,opening%20the%20eyes%2C%20and%20sensitivity%20to%20light.
https://en.wikipedia.org/wiki/Mustard_gas#:~:text=The%20name%20of%20mustard%20gas,used%20the%20poison%20in%20combat.
https://blog.qrfs.com/237-the-deadliest-fires-in-u-s-history-lessons-learned-part-2/#:~:text=After%20multiple%20complaints%20from%20neighbors%20about%20noise%2C,the%20walls%20and%20ceiling%20around%20the%20stage.
https://www.qualityovhd.com/new-blog/never-leave-a-car-running-in-the-garage#:~:text=When%20igniting%20a%20car's%20engine%2C%20it%20burns,like%20a%20garage%2C%20creating%20a%20deadly%20environment.
https://www.omegaenv.com/environmental-consulting-firm-blog/dangers-of-hydrogen-sulfide-aka-sewer-gas/#:~:text=Irritated%20eyes%2C%20nose%2C%20throat%2C,Effects%20may%20be%20delayed.&text=Severe%20eye%20and%20respiratory%20irritation,nausea%2C%20vomiting%2C%20and%20more.&text=Shock%2C%20convulsions%2C%20inability%20to%20breathe,on%20the%20level%20of%20concentration.
https://www.cganet.com/inhaling-helium-party-fun-or-deadly-menace/#:~:text=Victims%20simply%20do%20not%20have%20time%20to%20react.
https://wwwn.cdc.gov/tsp/mmg/mmgdetails.aspx?mmgid=394&toxid=69#:~:text=of%20combustible%20materials-,Nitrogen%20Dioxide,accelerate%20burning%20of%20combustible%20materials