GeographyICSE Class 8 · Urbanisation

Urbanisation: Meaning, Causes and Impacts (ICSE Class 8 Geography)

Updated 17 October 2026 · Draft, not yet fact-checked

Urbanisation is the process by which an increasing share of a country's population lives in towns and cities. Level of urbanisation = urban population / total population x 100. Its causes include industrialisation, rural-urban migration, growth of services and better amenities. It brings jobs, services and growth but also slums, pollution, traffic, water shortage and loss of farmland.

Notice that several causes push people into cities, and the result is both benefits (green) and problems (red).

Illustration drawn for QuestionBuddy.

Understand Urbanisation: Meaning, Causes and Impacts

1. Meaning and measure. Urbanisation is the process by which a rising proportion of a country's population comes to live in urban areas. Level of urbanisation (%) = urban population / total population x 100. Mere growth of a city is not enough: if rural and urban populations grow at the same rate, the share does not change. Urban areas have most people in secondary and tertiary work, high density, better infrastructure and administrative and commercial functions. The world became more than half urban around 2007, and the UN projects about two-thirds by 2050; urbanisation is higher in developed countries and growing fastest in Asia and Africa.

2. Causes.
1. Industrialisation: factories create jobs and attract workers.
2. Rural-urban migration, driven by push and pull factors.
3. Growth of the service sector (banking, trade, transport, IT, education, health).
4. Better amenities: schools, colleges, hospitals, electricity, water and entertainment.
5. Natural increase among people already in cities.
6. Reclassification: large villages or areas absorbed by an expanding city become urban.
7. Transport and communication links.
8. Government policies: administrative centres, industrial areas and special economic zones.

3. Positive impacts. Economic growth and a large share of national income; wide employment; better services (hospitals, colleges); infrastructure such as metro, electricity, water and internet; social change including more opportunities for women and weaker caste barriers; innovation; cultural exchange.

4. Negative impacts.
1. Slums, as in Dharavi in Mumbai (often described as one of the largest in Asia), when affordable housing lags behind growth.
2. Overcrowding and traffic congestion.
3. Air, water and noise pollution.
4. Water shortage and falling groundwater.
5. Solid waste that is not fully collected or treated.
6. Urban sprawl: loss of farmland and green spaces; filling of wetlands and lakes increases flooding.
7. Urban heat island: built-up areas stay hotter than the countryside.
8. Social problems: unemployment, crime, stress and inequality.

5. Linking causes and impacts. Rural-urban migration (cause) is also why slums and overcrowding (impacts) appear: growth of people outpaces housing, water and transport.

Urbanisation: Meaning, Causes and Impacts: key facts

Level of urbanisation: $L e v e l o f u r bani s a t i o n (p er ce n t) = u r ban p o p u l a t i o n / t o t a l p o p u l a t i o n x 100∣ U ni t : p er ce n t$
Main causes: Industrialisation
Rural-urban migration
Services
Amenities
Transport
Policy
Positive impacts: Growth
Jobs
Services
Infrastructure
Innovation
Cultural exchange
Negative impacts: Slums
Congestion
Pollution
Water shortage
Waste
Sprawl
Heat island

How to answer Urbanisation: Meaning, Causes and Impacts questions

Define urbanisation by the rising share of urban population.

1For level of urbanisation, write formula, substitution and per cent.
2For causes and impacts, group points under economic, social and environmental headings.
3Give an Indian example where possible (Dharavi, Navi Mumbai).
4Link every impact to a cause for a higher-order answer.

Urbanisation: Meaning, Causes and Impacts in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

A town in ten years

Suppose a town had 40,000 people in 2015, of whom 12,000 lived in urban wards. By 2025 it has 60,000, of whom 27,000 live in urban wards.

Find the level of urbanisation in each year and say if urbanisation has increased.

Try it first, then show the solutionSolution

2015: 12,000 / 40,000 x 100 = 30 per cent.
2025: 27,000 / 60,000 x 100 = 45 per cent.
The urban share rose from 30 to 45 per cent, so urbanisation has increased.

Answer: 30 per cent to 45 per cent; urbanisation increased.

Memory hook: Share, not size, shows urbanisation.

Tricks to remember Urbanisation: Meaning, Causes and Impacts

Short memory aids. Say each one aloud once, then use it on a question the same day.

I M S A N R T P
Industrialisation, Migration, Services, Amenities, Natural increase, Reclassification, Transport, Policy: the eight causes.
Use it when: Cause lists.
Slum, Smog, Sprawl
Three S words for the major negative impacts.
Use it when: Impact answers.
Share not size
Urbanisation is about the share of urban people.
Use it when: Definitions.

Urbanisation: Meaning, Causes and Impacts: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Meaning · 2 marks · Short answerBoard level

Define urbanisation and state how it is measured.

Try it first, then show the solutionSolution

Urbanisation is the process by which a rising proportion of a country's people live in towns and cities.
It is measured by the level of urbanisation: urban population / total population x 100.

Answer: Rising urban share; measured as urban population / total population x 100.

Example 2: Two causes · 2 marks · Short answerBoard level

State any two causes of urbanisation.

Try it first, then show the solutionSolution

Industrialisation creates jobs in factories near cities.
Rural-urban migration brings people for jobs and better services.

Answer: Industrialisation and rural-urban migration.

Example 3: Level of urbanisation · 4 marks · Long answerHarder board level

A state has 6.4 crore people, of whom 2.24 crore live in urban areas. (a) Find the level of urbanisation. (b) Next year its total is 6.5 crore and urban population is 2.405 crore. Has urbanisation increased?

Try it first, then show the solutionSolution

(a) 2.24 / 6.4 x 100 = 35 per cent.
(b) 2.405 / 6.5 x 100 = 37 per cent.
The share rose from 35 to 37 per cent, so urbanisation increased.

Answer: (a) 35 per cent (b) 37 per cent; increased.

Example 4: Slums · 3 marks · Short answerHarder board level

Explain how rapid urbanisation leads to slums and name two problems residents face.

Try it first, then show the solutionSolution

When cities grow faster than affordable housing, poor migrants build crowded settlements.
Problems: lack of clean water and sanitation; poor drainage and risk of disease.

Answer: Growth outpaces housing; residents lack water and sanitation.

Example 5: Cause and effect · 4 marks · Long answerHOTS / competency

A rapidly growing city notices more floods during heavy rain. Explain two urban reasons for this and one more environmental effect of urbanisation.

Try it first, then show the solutionSolution

Reason 1: urban sprawl covers soil with concrete and roads, so rainwater cannot soak in.
Reason 2: lakes and wetlands that absorb water are filled in for building, and drains get blocked by waste.
Another effect: air pollution from vehicles and industry, or the urban heat island.

Answer: Concrete covers and filled wetlands cause floods; also air pollution or heat island.

Where students lose marks in Urbanisation: Meaning, Causes and Impacts

The slips examiners see most often, and what to write instead.

Mistake: Defining urbanisation as city growth
The share of urban people is not mentioned.
Do this: Include "increasing proportion of the population living in urban areas".
Usually costs: 1 mark.
Mistake: Listing impacts without examples
Answers stay general.
Do this: Add Dharavi (slum) or similar examples from the chapter.
Usually costs: 1 mark.
Mistake: Percentage calculation errors
Urban and total are interchanged.
Wrong working
Level = 6.4 / 2.24 x 100
Right working
Level = 2.24 / 6.4 x 100 = 35 per cent
Do this: Urban goes on top.
Usually costs: 2 marks.
Mistake: Mixing up positive and negative points
Congestion appears under benefits.
Do this: Write two columns before answering.
Usually costs: 1 mark.

Exam tips

Write the formula for level of urbanisation in every numerical answer.
Balance positive and negative impacts when the question says "discuss".
Use headings: economic, social, environmental.
Name the cause behind every impact you list.

Practice questions on Urbanisation: Meaning, Causes and Impacts

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

Q1 · 1 mark · MCQBoard level
Which of these is a positive impact of urbanisation?
(a) slums
(b) better hospitals and colleges
(c) traffic congestion
(d) air pollution
Hint
Pick the advantage.
Answer
(b) better hospitals and colleges.
Q2 · 1 mark · Very short answerBoard level
What is urban sprawl?
Hint
Cities spreading.
Answer
The outward spread of built-up urban areas into surrounding farmland and open land.
Q3 · 2 marks · Short answerBoard level
Name any two negative impacts of urbanisation.
Hint
Think of environment.
Answer
Slums and overcrowding; pollution; traffic congestion; water shortage (any two).
Q4 · 3 marks · Short answerHarder board level
In a country of 80 million people, the urban population rises from 20 million to 28 million while the total rises to 90 million. Find the level of urbanisation before and after.
Hint
Two divisions.
Answer
Before: 20 / 80 x 100 = 25 per cent. After: 28 / 90 x 100 = 31.1 per cent (about 31 per cent). Urbanisation has increased.
Q5 · 1 mark · Assertion-reasonHarder board level
Assertion (A): Urbanisation increases only when the number of city dwellers grows.
Reason (R): Urbanisation is measured by the share of urban people in the total population.
(a) Both A and R are true and R is the correct explanation of A.
(b) A is false but R is true.
(c) A is true but R is false.
(d) Both A and R are false.
Hint
Does growth in numbers alone raise the share?
Answer
(b) If both populations grow at the same rate, the share does not change.
Q6 · 3 marks · Short answerHarder board level
Explain how urbanisation affects (a) water, (b) waste and (c) temperature in a city.
Hint
Three environmental effects.
Answer
(a) Demand exceeds supply and groundwater falls. (b) Huge amounts of garbage are produced and much is not collected or treated. (c) Built-up surfaces create an urban heat island, so the city stays hotter than the countryside.
Q7 · 3 marks · Case-basedHOTS / competency
A city's population doubled in 20 years but its rural hinterland also doubled. A student says the city is urbanising twice as fast. Evaluate her claim.
Hint
Think of the share.
Answer
The claim is wrong. If both populations doubled, the share of urban people stayed the same, so the level of urbanisation did not change. City growth alone does not mean urbanisation.
Q8 · 4 marks · Long answerHOTS / competency
"Urbanisation is both a result of development and a cause of problems." Support the statement with two points each.
Hint
Two for, two against.
Answer
Result of development: industry and services create jobs and attract people; better amenities draw migrants. Cause of problems: slums and overcrowding appear when housing lags; pollution and water shortage grow with population and traffic.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

1.Formula for urbanisation level?Show answer
Urban population / total population x 100.
2.Name two causes.Show answer
Industrialisation and rural-urban migration.
3.Which slum in Mumbai is often described as one of Asia's largest?Show answer
Dharavi.
4.What is the urban heat island?Show answer
Built-up areas staying hotter than surrounding countryside.
5.By when does the UN project two-thirds urban?Show answer
About 2050.

Urbanisation: Meaning, Causes and Impacts: frequently asked questions

Is urbanisation the same as growth of cities?

No. It is a rise in the share of the population living in urban areas.

Which regions are urbanising fastest?

Asia and Africa.

Why do wetlands matter in cities?

They absorb floodwater; filling them in increases flooding.

Are all impacts of urbanisation negative?

No. Jobs, services, innovation and cultural exchange are positive impacts.