cassidy, (edited ) 
I got an air quality sensor and air purifier, and have learned:
• opening the windows is the most effective way to decrease particulate matter
• our humidifier pumps out hazardous levels of particles when using tap water (oops)
• waking up w/an irritated throat and sinuses goes away with clean air!
• high particulate matter is correlated with nosebleeds in kids—and our kid gets chronic nosebleeds
I am happy to have learned all of this but also feel like an idiot for learning it so late. 😭
