Scented products cause indoor air pollution on par with car exhaust

I fully support research like this, because it's always good to get proper data about phenomena. However, I can't help feeling that the results are unsurprising: how could you smell the scented candles if they weren't producing nanoparticles? Surely the existence or abundance of these nanoparticles was never in question?

This was my initial thought too. Like if I grow a bunch of nice smelling flowers, and crack open a window during the spring. Am I worse or better off than purchasing a scented candle.

Should we as a species stop nice smelling things entirely.

The sub-species that I belong to does stop smelling those nice things entirely as my nose clogs up, eyes water, and convulsions known to many as "sneezing" take over my body.