In 1929, following the intensive exploitation of the coal mines under the site, the ground broke down ruining the castle and forcing its evacuation.

Threats Historical declines resulted from intensive exploitation of laurel forests.

The main reason that giant clams are becoming endangered is likely to be intensive exploitation by bivalve fishing vessels.

Despite over 90 years of intensive exploitation it remains one of the largest known copper resources.

Approximately 200,000 Poles worked in the eastern provinces of Prussia among low living standards and intensive exploitation.

After six years of intensive exploitation Ewa had to be renovated.

During this time of intensive exploitation of forests a whole new sector, the wood chemistry industry, appeared and then later vanished.

Through the perception of common property, these resources have been subjected to intensive and specific exploitation.

The general consensus is that these hill-forts are associated with a more intensive exploitation of the iron resources of the Weald.

After the 1650s, the process of regular and intensive agrarian exploitation was complete.