Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Chengjiang Fossil Site' has mentioned 'Mining' in the following places:
Occurrence Sentence Text Source
They have been exploited in part through efforts that began at about the same time that Hou Xian-guang discovered the deposits that bear these exceptional fossils, with phosphate mining bringing in some 2/3 of the city's revenue in 2003.
A consequence of this was renewed mining efforts in the region, which threatened the fossil-bearing strata due to erosion, slumping of overburden, and simple destruction by the mining efforts.
Prior to 2004, 14 phosphate mining operations occurred in the buffer zone of the property.
The process of rehabilitating these former mining sites is ongoing and will take some considerable time.
No mining activities have actually impacted on the property itself and the ongoing commitment of County and Provincial governments to not open or re-open mines within the property or its buffer zone are critical to protect the values of the property.