➔ Primary – Collection of raw materials or production of essential goods e.g. fishing, farming, energy production. Primary is the most essential sector, as the rest of the population relies on its success for food, electricity and water. Each primary worker is subjected to different working conditions, depending on what they collect/ produce. However, primary employment is labour intensive, so presents risks to physical health and some mental health (UK rural farmers can face isolation and depression, as recent studies have shown).