Three sectors of the economy
All work can be put into three big groups, called sectors:
- Primary sector: taking things from nature. Farming, fishing, forestry, mining.
- Secondary sector: making goods from raw materials. Factories, building, power plants.
- Tertiary sector: giving services. A service is useful work done for someone, without making a new object.
The three are linked. Cotton (primary) becomes a shirt in a factory (secondary). Then trucks carry it, a wholesaler stores it, a shop sells it, a bank handles the payment and an advert tells you about it. All of these steps are services: production → distribution → sales.
Kinds of services
- Trade: buying and selling. Wholesale trade sells large amounts to shops; retail trade sells small amounts to us. Trade inside a country is internal trade; trade between countries is international trade (exports and imports).
- Transport and communication: moving goods, people and information.
- Finance: banks, insurance, payments.
- Social services: health care, education.
- Public administration: offices that run a town or country, police, courts.
- Personal and business services: hairdressers, repair shops, IT, advertising, research.
- Tourism and leisure: hotels, travel, culture, sport.
Services usually gather in towns and cities, where there are many customers. A city's centre is often full of shops, offices and banks.
Transport routes
- Road: door-to-door, flexible, good for short distances.
- Rail: carries heavy goods and many passengers over long distances, uses less fuel per tonne.
- Water: rivers, canals and sea routes. Slow but the cheapest for very heavy cargo; most world trade goes by ship in containers.
- Air: fastest, for people, mail and light, valuable or urgent goods; most costly and highest emissions per tonne.
- Pipelines: carry oil, gas and water.
Big transport hubs (ports, airports, junctions) attract warehouses and businesses. Transport also has a footprint: fuel, air pollution and greenhouse gases. Rail and water usually pollute less per tonne than road and air.
Tourism
Tourism is travel for holidays, culture, sport, health or business. A place's tourism potential comes from:
- Natural attractions: beaches, mountains, lakes, caves, forests, wildlife.
- Human (cultural) attractions: old towns, forts, temples, museums, festivals, food.
- Infrastructure: roads, airports, hotels, safety and information.
Tourism gives jobs and income. But too many visitors (overtourism) can cause traffic, waste, high house prices and damage to nature. Sustainable tourism spreads visitors out, protects nature and culture, and keeps money in the local area.
Digital, sharing and circular services
- Digital services: online shopping, banking apps, streaming, online classes. A shop can now sell anywhere.
- Platform economy: an app links customers and providers: taxi rides, food delivery, holiday rentals. Riders and drivers often work as gig workers, paid per job, with less security.
- Sharing economy: people share instead of owning: shared bikes, car clubs, tool libraries.
- Circular economy: instead of take → make → throw away, things are kept in use: repair, reuse, refurbish, recycle. Many of these are services: repair shops, second-hand markets, renting and leasing, recycling collection.
Why services grow as countries develop
In a farming economy most people work on the land. As machines make farming and industry more efficient, fewer people are needed there. People earn more and spend more on services like health, education, travel and fun. So the share of workers in services grows: this is called tertiarisation. In many rich countries, about 70–80% of workers are in services. India's services already give over half of its national income, even though many people still farm.
Try it: a local case study
Walk down your street or think of your neighbourhood. List 10 places where people work and mark each P, S or T. Which sector has the most? Then try the 3D slider: which stage is your area most like?
Key formulas and definitions
- Primary = from nature; Secondary = making goods; Tertiary = services
- Production → distribution (transport, wholesale) → sales (retail)
- Transport modes: road, rail, water, air, pipeline
- Tourism potential = natural + cultural attractions + infrastructure
- Circular economy: repair, reuse, refurbish, recycle
Worked examples
1. Sort into sectors: fisherman, car factory worker, teacher, bus driver, coal miner.
Primary: fisherman, coal miner. Secondary: car factory worker. Tertiary: teacher, bus driver.
2. Which transport mode is best for 50,000 tonnes of iron ore going overseas?
Sea transport: it is slow but the cheapest for very heavy cargo over long distances.
3. A hill town has a lake, an old fort and a new airport. What gives it tourism potential?
Natural attraction (lake, hills), cultural attraction (fort) and infrastructure (airport).
4. A phone is fixed at a repair shop instead of being thrown away. Which ideas does this show?
It is a service (repair) and part of the circular economy (keeping products in use).
5. In a town, 2 of 20 workers farm, 5 work in factories and 13 in services. What percentage work in services?
13 ÷ 20 × 100 = 65%. This is a service-led economy.
Common mistakes
- Thinking the tertiary sector makes goods. It does not produce objects; it gives services.
- Putting construction in the tertiary sector. Building is secondary, because it makes something physical.
- Thinking tourism only means beaches. Culture, food, religion, health and business trips are tourism too.
- Assuming air transport is always best because it is fast. It is the most costly and polluting per tonne.