I run an indoor sensor from a different company and it definitely allows me to measure whenever the neighbors are doing yardwork, or there's a fire down the str

I run an indoor sensor from a different company and it definitely allows me to measure whenever the neighbors are doing yardwork, or there's a fire down the street, etc. My sensor is indoor, but I am curious about picking up an outdoor sensor to see if I can find any long-term correlation between a train passing and increase in emissions.