If there is pollution (the Biotech type) near a well, the water from that well has a chance to be contaminated and cause diarrhea. The waster xenotype is all about living in polluted areas, but they suffer from contaminated water just like everybody else, so they can't thrive in pollution the way they're meant to. Should Toxic Environment Resistance apply to the chance of getting diarrhea from contaminated water? Or is it expected that waster colonies will clear out a 15x15 area around their wells to avoid contaminating their water supply?