06-17-2008, 05:59 PM
Decline in the groundwater level meant the space under the surface was now occupied by gases, which often could not support the weight of the layers above. Different layers of earth tend to move as a result, leading to cracks on the surface, reasoned Ansari.
http://timesofindia.indiatimes.com/Cities/...how/3137212.cms
http://timesofindia.indiatimes.com/Cities/...how/3137212.cms