Walls can develop cracks and extra humidity can attract mold. It’s been noted that roads are prone to potholes where there is geopathic stress. Hay and other less-fireproof materials are more likely to catch fire in the GS zones. It’s been observed that road accidents happen more often in geopathic zones (in some countries such roads have warning signs). Other clues to the path of a black stream include lightning-struck trees, dead or stunted gaps in hedges and avenues of trees, infertile fruit trees, cankers, and strangely twisted trees.
Geopathic stress can be spread from the path of the streams throughout a building by the steel construction frame, electrical wiring, and pipe work, just as it can be spread along railway tracks. Thus a steel-framed structure with black streams running through it can be more dangerous than a brick or wood structure under the same conditions.