Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Cities Sinking in Pakistan's Baluchistan Province Ayaz Gul ISLAMABAD - Local and American experts warn unchecked groundwater extraction in major urban centers in Pakistan's Baluchistan province has triggered the sinking of the land at a rate of 10 centimeters a year, causing cracks in buildings, roads, and agricultural fields. The land subsidence is occurring in numerous locations in northern parts of Baluchistan, including districts of Qilla Abdullah, Pishin, Mastung and the provincial capital of Quetta, the largest population center in the province. The area is arid and groundwater is the only source of water for domestic and agricultural use, said Professor Din Muhammad Kakar of the University of Baluchistan. "We have drawn a lot of water from the subsurface and the over-exploration of the groundwater has triggered the phenomenon of land subsidence since 2010," said Kakar, who is dean and chairman of the department of seismology. The collapsing of land has ruptured many old and new buildings in Quetta and other areas, including hospitals and schools. "There are about a dozen locations in Quetta where cracks as long as four kilometers and more than 400 feet deep have appeared, rendering the land useless for agriculture and living," Kakar said. .