1. Chapter at a Glance
India has a long urban past — Harappan Dholavira, Kalibangan and Rakhigarhi, and historic cities like Varanasi, Ujjain and Vijayanagara. Today urban areas concentrate people, businesses, government offices and transport and communication networks, and are run by elected municipal bodies; rural areas are villages with smaller populations, close communities and mostly farm-based work, run by gram panchayats. This chapter explains how cities grow into economic and cultural hubs, the challenges they face, and how good urban planning can make them better places to live.
- How do cities become centres of economic activity?
- How does urbanisation affect people's lives?
- What challenges do 21st-century cities face, and how can planning help?
2. Urban, Rural and Density
- Definitions differ by country: a place becomes urban above about 220 people in Denmark, 50,000 in Japan, and 5,000 in India (India's census also requires a density of at least 400 per km² and most male workers in non-farm jobs, besides places with a municipality).
- Population density = total population ÷ area (km²) — people per square kilometre. Satellite images of a Haryana village (open green and brown fields) and Gurugram (dense grey built-up area) show the difference clearly.
- The UN expects the world's urban share to rise from about 55% now to 68% by 2050. India's urban share has grown from about 17% in 1951 to about 31% in 2011, and recent estimates put it at roughly 36–40%.
- Among the world's most populous cities (UN estimates, 2025) are Jakarta, Dhaka, Tokyo, New Delhi (about 3 crore) and Kolkata.
3. How Cities Grow
Urbanisation is the shift of population from rural to urban areas. A village with farm work attracts people → shifts to small industries, transport and services → becomes a town and trading centre → gains factories, banks, hotels, offices and entertainment → offers diverse jobs → expands into a metropolis with high-rises, malls, metros and dense transport networks.
| Driver of growth | Example |
|---|---|
| Natural resources and industry | Jamshedpur: the village of Sakchi near iron-ore deposits became the site of the Tata steel works; planned with wide tree-lined roads, parks and a hospital, it was renamed Jamshedpur in 1919 and is now Jharkhand's biggest industrial city |
| Port location and finance | Mumbai: Arabian Sea port; Bombay Stock Exchange (1875) made it India's financial capital; film industry from the 1910s; Bandra–Worli Sea Link and Coastal Road |
| Knowledge clusters | Bengaluru (“Silicon Valley of India”) and Hyderabad: IT firms, start-ups and universities working together |
| Specialised small cities | Moradabad (brass), Ludhiana and Tiruppur (textiles), Jaipur (gems, crafts), Channapatna (wooden toys), Kanchipuram (silk); Kochi, Indore, Lucknow, Nagpur growing as cheaper business bases |
| Heritage and pilgrimage | Agra (Taj Mahal), Amritsar, Varanasi — tourism supports transport, hotels, food and crafts |
| Administration | Delhi: capital through many eras; growth spread into the National Capital Region (NOIDA, Ghaziabad, Gurugram — an IT and BPO hub since the 1990s), helped by highways and the Metro |
4. Cities as Cultural Hubs
Cities mix people, languages, food and festivals. Mumbai's vada pav — a Maharashtrian potato fritter inside a pav (a bread introduced by the Portuguese) — became the cheap, portable meal of mill workers. Kolkata's Durga Puja was inscribed on UNESCO's list of Intangible Cultural Heritage in 2021, and the city keeps colonial-era institutions like the Indian Museum. Museums, libraries, stadiums, street art and festivals help people meet and build networks.
5. Challenges of Cities
- Pressure on housing, water, energy and transport; narrow, crowded roads and traffic jams.
- Air pollution: the NCR often records an Air Quality Index (AQI) above 400 in winter, whereas 0–50 is considered good.
- Urban heat islands: concrete and asphalt make cities hotter than surrounding areas.
- Waste, flooding in monsoons, shrinking green spaces, crime linked to density and inequality.
- Slums — overcrowded settlements with poor housing and services, near railway lines, industrial areas and city edges — grow because affordable housing is scarce. Their residents keep cities running as vendors, domestic workers, builders and plumbers. Schemes like Pradhan Mantri Awas Yojana provide affordable housing.
Bengaluru, once a city of many lakes, lost most of them to rapid building; others were poisoned by sewage and chemicals — Bellandur and Varthur lakes frothed with toxic foam and even caught fire. Groundwater overuse and encroachment brought summer shortages and monsoon floods. Citizens' groups, resident welfare associations and non-profits are reviving lakes such as Yelahanka by desilting, repairing bunds, clearing inflow channels, planting native species and restocking fish.
6. Planning Better Cities
Urban planners ask: how many people, what jobs, what transport, where homes, offices, parks, schools and hospitals should go, and how to keep streets safe for walkers and cyclists — while adapting to climate change.
| Example | Planning features |
|---|---|
| Jaipur — the “Pink City” (founded 1727 by Sawai Jai Singh II; planned by Vidyadhar Bhattacharya) | Grid of rectangular blocks (chowkris) aligned to the cardinal directions using vāstu and śhilpa śhāstra; wide streets, nine squares, gardens; a city wall with seven gates; uniform pink sandstone façades; reservoirs, canals and stepwells like Panna Meena Kund; shaded market arcades |
| Singapore (over 8,000 people per km²) | Long-term Concept Plan looking decades ahead; Master Plan revised every 5 years; mixed-use neighbourhoods; integrated rail, bus, cycle and walking links; high-rises with vertical and rooftop gardens (“garden city”); housing for seniors next to health and childcare |
| Sabarmati Riverfront, Ahmedabad | Promenades, parks, markets and the pedestrian Atal Bridge |
| M.G. Road, Gangtok | Clean, pedestrian-only shopping street |
Technology helps too — intelligent traffic systems, online grievance platforms, solar-powered public spaces. A sustainable city balances growth with care for people and nature and includes the vulnerable, not just the well-off.
7. Master Table: Key Terms
| Term | Meaning |
|---|---|
| Urbanisation | Rise in the share of people living in towns and cities |
| Population density | Population ÷ area (people per km²) |
| Satellite view | Top-down image of the Earth taken from space |
| Metropolis | Very large city with a wide surrounding urban region |
| Slum | Overcrowded settlement with poor housing and services |
| Heat island | Urban area hotter than its surroundings |
| AQI | Air Quality Index — higher means worse air |
| BPO | Business Process Outsourcing |
| Master Plan | Long-term plan guiding a city's growth |
| Blue zone | Area where people live unusually long, healthy lives |
8. Master Summary Table
| Theme | Key point |
|---|---|
| Growth drivers | Resources, ports, finance, IT clusters, heritage, administration |
| Culture | Mixing of food, languages, festivals; Durga Puja (UNESCO 2021) |
| Problems | Pollution, traffic, slums, water stress, floods, heat |
| Solutions | Planning (Jaipur, Singapore), housing schemes, lake revival, public transport, green spaces |
Chart — share of people living in urban areas:
9. Mind Map
- Urban vs rural
- Density formula
- Jamshedpur, Mumbai
- Bengaluru, NCR
- Vada pav
- Durga Puja
- AQI, traffic, slums
- Lakes lost, heat
- Jaipur, Singapore
- Sabarmati, Gangtok
10. Tips and Tricks
- Density = “People per Patch” (population ÷ km²).
- Jaipur: 1727, 9 squares, 7 gates, pink stone.
- Singapore plans: Concept (decades ahead) + Master (every 5 years).
- A large village is not automatically urban; India's census uses population, density and occupation tests.
- Slum dwellers are not a burden — they supply much of a city's essential labour.
11. Important One-liners
- In India a settlement needs at least 5,000 people to count as urban.
- Population density is people per square kilometre.
- Sakchi was renamed Jamshedpur in 1919.
- Mumbai became India's financial capital after the BSE was set up.
- Bengaluru is called the Silicon Valley of India.
- Channapatna is famous for wooden toys.
- Kolkata's Durga Puja is on UNESCO's heritage list.
- An AQI above 400 is severe pollution.
- PM Awas Yojana provides affordable housing.
- Vidyadhar Bhattacharya planned Jaipur.
- Singapore is called a garden city.
12. Exam-pattern Questions with Detailed Answers
A district has 6,00,000 people and an area of 1,500 km². What is its population density?
- 200
- 300
- 400
- 900
Show answer
Density = 6,00,000 ÷ 1,500 = 400 people per km².
Answer: (C)
Which city grew around a steel plant near iron-ore deposits?
- Surat
- Jamshedpur
- Jaipur
- Gangtok
Show answer
Jamshedpur (formerly Sakchi), Jharkhand.
Answer: (B)
What is an urban heat island?
Show answer
A city area that is warmer than nearby rural areas because concrete, asphalt, vehicles and air-conditioners trap and release heat, and there is little greenery.
Answer: City hotter than surroundings
Explain three reasons why some places become big cities.
Show answer
Location on rivers, coasts or trade routes (Mumbai, Kolkata ports); nearby resources and industry (Jamshedpur steel); clusters of skills and institutions (Bengaluru IT); administrative importance (Delhi); heritage and pilgrimage (Varanasi, Agra).
Answer: Location, resources, clusters, administration, heritage
How do cities and villages depend on each other?
Show answer
Villages supply food, raw materials and workers to cities; cities supply markets for farm produce, manufactured goods, services, jobs and remittances to villages. Good roads and fair prices help both grow together.
Answer: Food and labour flow in; goods, jobs and money flow out
What made Jaipur a well-planned city?
Show answer
A grid layout aligned to directions, wide streets and squares for trade, walls and gates for security, uniform pink sandstone for a cohesive look, water from reservoirs, canals and stepwells suited to a dry climate, and shaded markets.
Answer: Grid plan, water systems, climate-sensitive design
Why do slums form, and how can the problem be addressed?
Show answer
Migrants come for jobs but cannot afford formal housing, so they settle on vacant land near railways or factories. Solutions: affordable housing (PMAY), in-situ upgrading with water, toilets and drainage, rental housing for migrants, schools and clinics nearby, and job security.
Answer: Lack of affordable housing; upgrade and house people
What lessons can Indian cities learn from Singapore?
Show answer
Plan long-term but revise regularly; mix homes, offices and parks to cut travel; integrate metro, buses, cycling and walking to reduce cars; build vertical and rooftop gardens to cool and green dense areas; place senior housing near health care and childcare. India can adapt these with local materials and climate knowledge, as Jaipur once did.
Answer: Flexible planning, mixed use, public transport, greenery, inclusion
Why did Bengaluru face both water shortage and floods, and what helps?
Show answer
Lakes that stored rain and recharged groundwater were built over or polluted, drains were blocked, and groundwater was over-pumped — so rain runs off and floods streets, while summers bring scarcity. Reviving lakes, rainwater harvesting, protecting lake beds, treating sewage and clearing channels address both problems.
Answer: Lost lakes and poor drainage; revive lakes, harvest rain
Suggest measures for traffic congestion and heat waves in cities.
Show answer
Traffic: better metro and bus networks, safe footpaths and cycle lanes, carpooling, parking charges, staggered office hours, work-from-home. Heat: more trees and parks, cool or green roofs, protecting water bodies, shaded streets and bus stops, heat-action plans with cooling shelters and early warnings.
Answer: Public transport and walking; greening and heat plans
“Cities can provide something for everybody only when they are created by everybody.” Explain.
Show answer
A city works when all contribute and are heard — planners and governments, businesses, workers including slum dwellers and street vendors, residents' groups reviving lakes, artists and citizens keeping streets clean. If planning serves only the rich, the poor, elderly and disabled are excluded; inclusive, participatory planning makes the city work for all.
Answer: Participation makes cities inclusive
13. Quick Revision Summary
- Urban vs rural; India's urban test (5,000 people); density = population ÷ area.
- Urban share: India ~17% (1951) → ~31% (2011); world 55% → 68% by 2050.
- Growth drivers: Jamshedpur (steel), Mumbai (port, finance), Bengaluru (IT), specialised towns, heritage cities, Delhi/NCR.
- Cities as cultural hubs: vada pav, Durga Puja.
- Challenges: AQI, traffic, heat islands, slums, floods; Bengaluru lake revival; PMAY.
- Planning: Jaipur (1727), Singapore, Sabarmati Riverfront, Gangtok's M.G. Road.