Why is it that as soon as we have any significant rain, our roads literally fall to pieces as sinkholes occur and, on a smaller scale (sizewise, but on a larger scale in frequency), potholes appear? According to the Council of Geoscience, South Africa, specific parts of the country’s ground surface are susceptible to sudden, disastrous collapse, which may lead to death, injury, or structural damage, depending on the size of the subsidence. 更多
