With particulate sensors becoming a cool new toy, I think a lot of people have the misconception that all particulate matter is the same (because that is all th

With particulate sensors becoming a cool new toy, I think a lot of people have the misconception that all particulate matter is the same (because that is all they can measure, so they focus on that one number). They don't stop to think whether the particles themselves are water droplets, poisonous chemicals, or something in between. I've had people tell me that campfire smoke is more deadly than cigarette smoke, because the campfire has more particles.