The construction industry is also in the secondary sector. Tertiary sector ... that operate in the primary sector would be farming, mining, fishing or oil production. The secondary sector of ...

Primary agricultural ... nature or from the primary sector. Secondary agricultural goods are treated products and preparations from primary agricultural goods. Together, these form the main definition ...

Oil production is separated into three phases: primary, secondary and tertiary, which is also known as Enhanced Oil Recovery (EOR). Primary oil recovery is limited to hydrocarbons that naturally ...