I know a certain framework creator that will be all over this - and has been vocal on twitter about it.

I went looking, this seems like a pretty good air quality monitor: https://www.amazon.com/AirVisual-Quality-Monitor-Accuracy-Pa... (~$400)

There are cheaper ones too; but do your research, as accuracy (and ideas about what constitutes accurate) can vary from manuf. to manuf.

https://medium.com/@dhh/air-quality-matters-but-dont-trust-f...

also apparently, a box fan + filter ain't so bad. https://www.youtube.com/watch?v=kH5APw_SLUU