Sorry..was offline for a day. Farms generate more than food. They generate among other things -Dust -Chemical over spray -Cow poop there is no such thing as a

Sorry..was offline for a day. Farms generate more than food. They generate among other things -Dust -Chemical over spray -Cow poop there is no such thing as a perfect filter. What you learn over time (not me, the factory as a whole) is that wind direction matters, everything matters, and you start to pick apart causes and figure out why.