Well I can't find the article. I saw lots of information about paraffin vs beeswax on google, but none of them were academic sources so I tend to not trust those as much. Of course, when you are burning
anything it gives off chemicals in the air - that's what smoke is. Honestly, I have scented candles at my house and love the way they smell. I haven't used them since I got pets but after doing some research today, I'm going to throw away those Yankee candles today. I have allergies and asthma and never really thought about how horrible candles and some of the cleaners I use are. Obviously, everyone can make their own decisions on that but candles and incense have a seriously scary amount of carcinogens when I read the study in post (broken link removed) so keep that in mind.
Sorry OP, I feel like this post has digressed but it was interesting to me
If anyone is looking for safer candles, I also found this little article on what to look for:
https://asthma.ca/corp/services/pdf/asthma_candles_eng.pdf