From the air:

The biggest exposure occurs indoors through

home renovation with conventional paints, plasterboard, polyurethane, flooring glues
pressed wood composites cabinets
dust accumulation on furniture, carpets
old cracking paints
damp, musty areas
vinyl, plastic shower curtain liner

Are you monitoring the level of VOC and nano particles where you live, where you work?

Do you have a trustworthy air purifier?

Exposure occurs outdoors through