The company strip-mines the valley despite protests from environmental groups.

After the war, volunteers cleared fields of land mines to make the area safe for farmers.

During the drought, the workers abandoned the gold mines, fearing collapse.

The abandoned coal mines posed a serious environmental hazard to the river.

Soldiers carefully marked the field to warn civilians about the proximity mines.

She decided to study mining engineering so she could design safer underground systems.

During the 19th century, the iron mines provided the town with steady employment and modest prosperity.

After the battle, the soldiers carefully searched the abandoned powder mines for usable explosives.

Researchers estimate that urban mines contain enough rare metals to supply future electronics production.

In the 19th century, many prospectors turned to drift mining to extract gold from ancient riverbeds.