Definition
The mining and quarrying is the activity / the business field in mining and quarrying, such as coal mining, oil and gas, metal ore, quarrying of rocks, clay, sand, salt mining and quarrying, mining chemicals and mineral fertilizers , and gypsum mining, asphalt, limestones.
1. Workers / employees / employee is the head of the household / the household members that works on another person or agency / office / company permanently and receives wages / salary, in cash or goods.
2. Entrepreneur are those who do business with to risk, both assisted by members of the household / workers or nothing.