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Environment and Sustainable Development

NCERT Class 12 · Economics Based on NCERT Class 12 Economics textbook · Free CBSE study kit

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Chapter Notes

Overview
This chapter explains the concept of environment, its vital functions, and the causes and effects of environmental degradation and resource depletion. It examines the state of India’s environment, highlighting the dual threats of poverty-induced degradation and pollution from affluence and industrialisation. The central idea is that economic development must shift to a sustainable path—meeting present needs without compromising the ability of future generations to meet their own needs. A student must understand that environment and economy are interdependent, and that unsustainable development leads to an environmental crisis with high opportunity costs.
Key Concepts (25)
Environment
The total planetary inheritance and the totality of all resources, including all biotic and abiotic factors that influence each other.
e.g. A forest includes biotic elements (trees, animals) and abiotic elements (soil, sunlight, water) that interact.
Biotic elements
All living elements of the environment, such as birds, animals, plants, forests, and fisheries.
e.g. Fish in the ocean are biotic elements.
Abiotic elements
Non-living elements of the environment, such as air, water, land, rocks, and sunlight.
e.g. Rocks and sunlight are abiotic elements.
Renewable resources
Resources that can be used without the possibility of depletion or exhaustion, as a continuous supply remains available.
e.g. Trees in forests and fishes in the ocean are renewable resources.
Non-renewable resources
Resources that get exhausted with extraction and use.
e.g. Fossil fuels like coal and petroleum are non-renewable resources.
Carrying capacity
The ability of the environment to perform its functions without interruption, meaning resource extraction does not exceed the rate of regeneration and wastes are within the assimilating capacity.
e.g. If a forest is cut down faster than it can regrow, the carrying capacity is exceeded.
Absorptive capacity
The ability of the environment to absorb degradation.
e.g. A river can absorb a certain amount of sewage before it becomes polluted beyond its absorptive capacity.
Environmental crisis
A situation where the environment fails to perform its vital function of life sustenance due to overuse of resources and generation of waste beyond its absorptive capacity.
e.g. Global warming and ozone depletion are manifestations of the environmental crisis.
Global warming
A gradual increase in the average temperature of the earth’s lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution.
e.g. Burning of fossil fuels and deforestation increase carbon dioxide, leading to global warming.
Ozone depletion
The phenomenon of reductions in the amount of ozone in the stratosphere, caused by high levels of chlorine and bromine compounds from CFCs and halons.
e.g. Use of CFCs in air-conditioners and refrigerators leads to ozone depletion, allowing more UV radiation to reach Earth.
Sustainable development
Development that meets the need of the present generation without compromising the ability of the future generation to meet their own needs.
e.g. Using solar energy instead of coal ensures energy needs are met without depleting resources for future generations.
Opportunity costs of negative environmental impacts
The high costs incurred due to environmental degradation, including expenditure on technology, research, health, and addressing global issues like global warming and ozone depletion.
e.g. Spending huge amounts on water purification because rivers are polluted is an opportunity cost of environmental degradation.
Land degradation
The deterioration of land quality due to factors like deforestation, unsustainable fuelwood extraction, shifting cultivation, overgrazing, and improper use of agro-chemicals.
e.g. Soil erosion in India due to deforestation leads to loss of nutrients like nitrogen, phosphorus, and potassium.
Biodiversity loss
The reduction in the variety of life forms, including genetic and ecosystem diversity, often caused by deforestation and habitat destruction.
e.g. Extinction of species as ecological niches disappear due to global warming.
Central Pollution Control Board (CPCB)
A government body set up in 1974 to address water and air pollution, lay down standards, monitor quality, and provide technical assistance.
e.g. CPCB monitors water quality in 125 rivers and assesses air quality through regulation of industries.
Brundtland Commission
The commission that defined sustainable development in the report 'Our Common Future', emphasising meeting the basic needs of all and extending opportunity for a better life.
e.g. The Brundtland definition is the most widely used definition of sustainable development.
Herman Daly's conditions for sustainable development
Five conditions: (i) limiting human population to carrying capacity, (ii) input-efficient technology, (iii) sustainable extraction of renewable resources, (iv) depletion of non-renewables not exceeding creation of renewable substitutes, (v) correcting pollution inefficiencies.
e.g. Using solar panels (renewable substitute) when depleting coal is an application of Daly's condition.
Chipko Movement
A forest protection movement in the Himalayas where people hugged trees to prevent felling.
e.g. In Karnataka, a similar movement was called 'Appiko', where 160 people hugged trees to save 12,000 trees.
Appiko Movement
A movement in Karnataka, meaning 'to hug', where villagers hugged trees to prevent commercial felling.
e.g. On 8 September 1983, 160 men, women, and children hugged trees in Salkani forest to stop woodcutters.
Montreal Protocol
An international agreement banning the use of CFC compounds and other ozone-depleting chemicals.
e.g. The Montreal Protocol led to the phase-out of CFCs in refrigerators and air-conditioners.
Kyoto Protocol
An international agreement (1997) to fight global warming by reducing emissions of greenhouse gases by industrialised nations.
e.g. The Kyoto Protocol called for reductions in carbon dioxide and other greenhouse gas emissions.
International Solar Alliance (ISA)
An international body led by India to increase solar power generation.
e.g. India is taking efforts to increase power generation through solar and leads the ISA.
Photovoltaic cells
Devices that use special materials to capture solar energy and convert it into electricity.
e.g. Solar panels on rooftops use photovoltaic cells to generate electricity for homes.
Biocomposting
The process of using organic wastes, often with the help of earthworms, to produce compost as a fertiliser and soil conditioner.
e.g. Earthworms convert organic matter into compost faster than normal composting.
Biopest control
The use of plant-based pesticides (e.g., from neem) and natural predators (e.g., snakes, birds) to control pests instead of chemical pesticides.
e.g. Neem-based pesticides and encouraging owls to prey on rodents are examples of biopest control.
Formulas & Equations (3)
Rate of resource extraction ≤ Rate of regeneration (for renewable resources)
Reads as: The rate of resource extraction must be less than or equal to the rate of regeneration
Variables: Rate of extraction: quantity of resource taken per unit time; Rate of regeneration: quantity of resource naturally replenished per unit time
Use when: When analysing whether the use of a renewable resource is sustainable
⚠ Students forget that this condition applies only to renewable resources, not non-renewable resources.
Rate of depletion of non-renewable resources ≤ Rate of creation of renewable substitutes
Reads as: The rate of depletion of non-renewable resources must be less than or equal to the rate of creation of renewable substitutes
Variables: Rate of depletion: quantity of non-renewable resource used per unit time; Rate of creation of renewable substitutes: quantity of renewable alternative developed per unit time
Use when: When evaluating sustainable use of non-renewable resources like fossil fuels
⚠ Students often apply the renewable resource condition to non-renewable resources, which is incorrect.
Waste generation ≤ Assimilating capacity of the environment
Reads as: Waste generated must be less than or equal to the environment's ability to absorb degradation
Variables: Waste generation: quantity of pollutants released per unit time; Assimilating capacity: maximum waste the environment can absorb without degradation
Use when: When assessing pollution levels and environmental crisis
⚠ Students confuse assimilating capacity with carrying capacity; assimilating capacity specifically refers to waste absorption.
How It Works
Functions of the Environment
  1. Supplies resources: provides both renewable (e.g., trees, fish) and non-renewable (e.g., fossil fuels) resources.
  2. Assimilates waste: absorbs and breaks down waste products.
  3. Sustains life: provides genetic and biodiversity to support life.
  4. Provides aesthetic services: offers scenery and natural beauty.
💡 The environment performs these functions without interruption only when demand is within its carrying capacity. Exceeding this leads to environmental crisis.
How Environmental Crisis Occurs
  1. Population explosion and affluent consumption increase demand for resources and waste generation.
  2. Resource extraction exceeds the rate of regeneration (for renewables) or waste exceeds assimilating capacity.
  3. The environment fails to sustain life, leading to degradation, resource depletion, and health costs.
  4. Global issues like global warming and ozone depletion add further financial and ecological burdens.
💡 The reversal of supply-demand relationship for environmental quality is key: demand now exceeds supply due to overuse and misuse.
Causes of Land Degradation in India
  1. Loss of vegetation due to deforestation.
  2. Unsustainable fuelwood and fodder extraction.
  3. Shifting cultivation and encroachment into forest lands.
  4. Forest fires and overgrazing.
  5. Non-adoption of soil conservation measures and improper crop rotation.
  6. Indiscriminate use of agro-chemicals (fertilisers, pesticides).
  7. Improper irrigation management and groundwater extraction exceeding recharge.
  8. Open access resources and poverty of agriculture-dependent people.
💡 Land degradation results from both natural and human-induced factors; the list is often asked in board exams as a 'state any six' question.
Strategies for Sustainable Development
  1. Use non-conventional energy sources: wind, solar, mini-hydel, CNG.
  2. Promote LPG and gobar gas in rural areas to reduce deforestation and pollution.
  3. Implement CNG in urban public transport to lower air pollution.
  4. Install wind mills in high-wind areas to generate clean electricity.
  5. Use photovoltaic cells to convert solar energy into electricity, especially in remote areas.
  6. Set up mini-hydel plants in mountainous regions using perennial streams.
  7. Revive traditional knowledge and practices (e.g., Ayurveda, herbal products).
  8. Adopt biocomposting using organic waste and earthworms for fertiliser.
  9. Use biopest control methods like neem-based pesticides and natural predators.
💡 These strategies are practical, India-specific, and often appear in long-answer questions. Students must be able to explain at least four in detail.
Global Warming Mechanism
  1. Burning of fossil fuels and deforestation increase greenhouse gases (CO2, methane) in the atmosphere.
  2. These gases absorb heat, raising the earth's lower atmosphere temperature.
  3. Consequences include melting of polar ice, sea level rise, coastal flooding, disruption of water supplies, species extinction, and increased tropical diseases.
💡 Global warming is human-induced since the Industrial Revolution; CO2 has increased by 31% and methane by 149% above pre-industrial levels.
Ozone Depletion Mechanism
  1. CFCs (from refrigerators, air-conditioners, aerosol propellants) and halons (from fire extinguishers) release chlorine and bromine into the stratosphere.
  2. These compounds break down ozone molecules, reducing the ozone layer.
  3. More UV radiation reaches Earth, causing skin cancer, harming phytoplankton, and affecting terrestrial plants.
💡 The Montreal Protocol banned CFCs and other ozone-depleting chemicals to address this issue.
Exam Traps — Don't Make These Mistakes
⚠ Confusing 'carrying capacity' with 'absorptive capacity'
✗ Carrying capacity is the ability of the environment to absorb waste.
→ Carrying capacity refers to the overall ability of the environment to perform all its functions without interruption, including resource regeneration and waste assimilation. Absorptive capacity is specifically the ability to absorb degradation (waste).
✓ Carrying capacity is the level at which resource extraction does not exceed regeneration and waste is within the assimilating capacity of the environment.
⚠ Mixing up renewable and non-renewable resource examples
✗ Water is a non-renewable resource.
→ Water is a renewable resource because it is continuously replenished through the water cycle, though overuse can lead to scarcity.
✓ Water is a renewable resource; examples of non-renewable resources include petroleum, coal, and iron-ore.
⚠ Thinking environmental crisis is only recent
✗ Environmental problems are new to this century.
→ The chapter explicitly states that environmental problems arose with population explosion and the Industrial Revolution, not just recently. The crisis has been building over centuries.
✓ Environmental problems are not new; they began with the Industrial Revolution and population explosion when demand for resources exceeded supply.
⚠ Confusing 'sustainable development' with 'economic growth'
✗ Sustainable development means continuous economic growth.
→ Sustainable development focuses on meeting needs without compromising future generations, which may require limiting growth and redistributing resources. It is not synonymous with unlimited growth.
✓ Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs, as defined by the Brundtland Commission.
⚠ Omitting the 'moral obligation' aspect in sustainable development
✗ Sustainable development is only about using resources carefully.
→ The chapter emphasises that sustainable development includes a moral obligation to hand over the planet in good order to future generations, and that meeting the needs of the poor is a moral issue.
✓ Sustainable development involves a moral obligation to bequeath a stock of 'quality of life' assets to future generations no less than what we inherited, and to redistribute resources to meet the basic needs of the poor.
⚠ Listing all strategies but not explaining any
✗ Strategies include using solar energy, wind power, CNG, etc.
→ Board exam questions often ask to 'describe' or 'explain' strategies. Simply listing them without elaboration loses marks.
✓ For each strategy, explain how it works and its environmental benefit. For example: 'CNG in urban areas: Compressed Natural Gas is used as fuel in public transport, significantly lowering air pollution as seen in Delhi.'
Compare & Contrast
Exhaustibility
Renewable resources
Non-renewable resources
Renewable resources can be used without depletion (e.g., trees, fish), while non-renewable resources get exhausted with extraction and use (e.g., fossil fuels).
Cause and effect
Global warming
Ozone depletion
Global warming is caused by increased greenhouse gases (CO2, methane) from burning fossil fuels and deforestation, leading to temperature rise. Ozone depletion is caused by CFCs and halons releasing chlorine and bromine, leading to reduced ozone and increased UV radiation.
Source of environmental threat
Poverty-induced environmental degradation
Pollution from affluence
Poverty-induced degradation results from overuse of marginal resources by the poor (e.g., deforestation for fuelwood). Pollution from affluence results from high consumption and industrialisation (e.g., vehicular emissions, industrial waste). India faces both simultaneously.
Exam Focus
Marks pattern: Typically 2-3 MCQs (1 mark each), 1 short answer (3 marks) on functions or causes, and 1 long answer (5-6 marks) on sustainable development strategies or India's environmental challenges.
Most asked: Definition and functions of environment · Causes and effects of environmental degradation · Sustainable development definition and strategies · State of India's environment (land degradation, air pollution, water contamination) · Global warming and ozone depletion causes and consequences
Don't skip: Explain any four strategies for sustainable development in India (5-6 marks).; What is sustainable development? Explain its significance with reference to intergenerational equity (5 marks).; Describe the state of India's environment with reference to land degradation, air pollution, and water contamination (5 marks).
One-Line Revision (read aloud before the exam)
  1. Environment includes all biotic (living) and abiotic (non-living) elements that influence each other.
  2. The four functions of the environment are: supplying resources, assimilating waste, sustaining life, and providing aesthetic services.
  3. Renewable resources like trees and fish can be used without depletion if extraction does not exceed regeneration.
  4. Non-renewable resources like fossil fuels get exhausted with use.
  5. Environmental crisis occurs when resource extraction exceeds regeneration and waste exceeds the assimilating capacity.
  6. Global warming is a human-induced increase in earth's temperature due to greenhouse gases from fossil fuels and deforestation.
  7. Ozone depletion is caused by CFCs and halons, leading to increased UV radiation and health risks.
  8. Sustainable development meets present needs without compromising future generations' ability to meet their own needs.
  9. India faces a dual environmental threat: poverty-induced degradation and pollution from affluence and industrialisation.
  10. Land degradation in India is caused by deforestation, overgrazing, improper irrigation, and excessive use of agro-chemicals.
  11. Strategies for sustainable development include using solar, wind, CNG, gobar gas, biocomposting, and biopest control.
  12. The Brundtland Commission defined sustainable development and emphasised intergenerational equity.
  13. Herman Daly's conditions include limiting population to carrying capacity and using renewable substitutes for non-renewables.
  14. The Central Pollution Control Board (CPCB) monitors water and air pollution in India.
  15. The Montreal Protocol banned CFCs to protect the ozone layer.
  16. The Kyoto Protocol aimed to reduce greenhouse gas emissions from industrialised nations.
  17. India leads the International Solar Alliance (ISA) to promote solar energy.
  18. Traditional knowledge systems like Ayurveda are being revived as they are environment-friendly.
  19. Biocomposting uses earthworms to convert organic waste into fertiliser.
  20. Biopest control uses neem and natural predators like snakes and owls to reduce chemical pesticide use.

MCQs — 10 Questions with Answers

Q1. Which of the following is NOT a function of the environment?

  • A. Supply of both renewable and non-renewable resources
  • B. Assimilation of waste generated by human activities
  • C. Regulation of all economic policies of the government ✓
  • D. Provision of aesthetic services like scenery and recreation

Answer: C — Environment performs four functions: resource supply, waste assimilation, life sustenance, and aesthetic services; regulation of economic policies is a governmental function, not environmental.

Q2. What is meant by 'carrying capacity' of the environment?

  • A. The total amount of resources present in the environment
  • B. Maximum level where resource extraction ≤ regeneration rate and waste ≤ absorptive capacity ✓
  • C. The capacity to transport goods and materials
  • D. The ability to store pollutants without any degradation

Answer: B — Carrying capacity means the environment can sustain itself when extraction does not exceed regeneration and waste remains absorbable without ecosystem damage.

Q3. Distinguish between renewable and non-renewable resources. Which statement is correct?

  • A. Coal is renewable; forests are non-renewable
  • B. Renewable resources deplete with use; non-renewable resources regenerate continuously
  • C. Forests (renewable) provide continuous supply; fossil fuels (non-renewable) get exhausted with extraction ✓
  • D. Both renewable and non-renewable resources have infinite supply

Answer: C — Renewable resources like forests regenerate naturally and provide continuous supply; non-renewable resources like fossil fuels are finite and deplete with extraction and use.

Q4. According to the chapter, why has water become an economic commodity in India?

  • A. Government has imposed high taxation on water
  • B. Rising population demands more water consumption
  • C. Past development polluted and dried rivers and aquifers, making water scarce ✓
  • D. Water has never been an economic commodity in India

Answer: C — Intensive extraction and pollution have degraded water sources, making freshwater scarce and forcing governments to spend on technology for extraction and treatment.

Q5. If atmospheric CO₂ concentration has increased by 31% since 1750 and CH₄ by 149%, what is the combined percentage increase in these two greenhouse gases?

  • A. 180%
  • B. 90%
  • C. Cannot be determined without individual quantities ✓
  • D. 31% + 149% = 180%

Answer: C — Percentage increases cannot be simply added without knowing the original quantities of CO₂ and CH₄; a weighted average would be needed for combined effect calculation.

Q6. Which of the following best explains why environmental problems were not significant before industrialisation?

  • A. Pollution was not harmful to living organisms
  • B. Population was low and demand for resources was less than supply, so pollution remained within absorptive capacity ✓
  • C. Technology was advanced enough to handle all pollution
  • D. No industrial activities existed, so no waste was generated

Answer: B — With low pre-industrial population and limited resource demand, the environment's absorptive capacity was sufficient to naturally break down wastes without accumulation.

Q7. Statement 1: Global warming is caused entirely by natural cycles of the earth. Statement 2: Increased greenhouse gases from burning fossil fuels contribute significantly to global warming. Which is correct?

  • A. Both statements are correct
  • B. Only Statement 1 is correct
  • C. Only Statement 2 is correct ✓
  • D. Neither statement is correct

Answer: C — The chapter states that 'much of recent global warming is human-induced' through burning fossil fuels and deforestation; Statement 2 alone is correct.

Q8. The chapter mentions that 70% of water in India is polluted. This statistic indicates which environmental problem?

  • A. Water has become an economic commodity due to scarcity and poor quality ✓
  • B. Water pollution is a minor issue in India
  • C. India has sufficient freshwater resources for development
  • D. Governments do not need to spend on water purification technology

Answer: A — High pollution levels (70%) make water scarce and valuable, forcing governments to spend significantly on technology, treatment, and research to provide clean water.

Q9. Which statement best reflects the relationship between past economic development and environmental degradation in India?

  • A. Economic development and environmental quality can both improve simultaneously without trade-offs
  • B. Environmental degradation is unrelated to economic development
  • C. The economic development achieved so far has come at the heavy cost of environmental quality and resource depletion ✓
  • D. India's environment has improved because of rapid economic growth

Answer: C — The chapter explicitly states that 'economic development achieved has come at very heavy price — at cost of environmental quality' with resource depletion and pollution.

Q10. HOTS: If the environment's absorptive capacity is exceeded and its carrying capacity is breached, which TWO functions of the environment are most immediately threatened?

  • A. Aesthetic services and resource supply only
  • B. Life sustenance and waste assimilation functions ✓
  • C. Resource supply and aesthetic services only
  • D. All four functions are equally threatened simultaneously

Answer: B — When absorptive capacity is exceeded, waste cannot be properly broken down (assimilation fails) and the environment loses capacity to support life (life sustenance fails); these are most directly threatened.

Flashcards

What is the environment according to economic definition?

Environment is the total planetary inheritance including all biotic (living: plants, animals, forests) and abiotic (non-living: air, water, land, rocks) elements that interact with each other.

Define carrying capacity in environmental economics.

Carrying capacity means the maximum level at which resource extraction does not exceed regeneration rate and wastes remain within the environment's absorptive capacity.

What is absorptive capacity?

Absorptive capacity is the environment's ability to absorb degradation and naturally break down wastes without losing its life-sustaining functions.

Distinguish renewable from non-renewable resources with one example each.

Renewable resources can be used continuously without depletion (example: forest trees); non-renewable resources get exhausted with extraction (example: fossil fuels).

Why has water become an economic commodity in India?

Water became an economic commodity because past intensive development polluted and dried up rivers and aquifers, making it scarce and requiring technology for extraction.

What is global warming and its main human cause?

Global warming is gradual increase in earth's lower atmosphere temperature caused mainly by burning fossil fuels and deforestation, which increase greenhouse gases like CO₂ and methane.

List four vital functions the environment performs.

Environment supplies resources, assimilates waste, sustains life through biodiversity, and provides aesthetic services like scenery.

What percentage of water in India is polluted?

Seventy per cent (70%) of water in India is polluted, leading to increased water-borne diseases and higher health expenditure.

What does the Kyoto Protocol (1997) aim to achieve?

The Kyoto Protocol is an international agreement calling for reductions in greenhouse gas emissions by industrialised nations to combat global warming.

Why were environmental problems not significant before industrialisation?

Before industrialisation, population was low and demand for environmental resources was much less than supply, so pollution remained within the environment's absorptive capacity.

Important Board Questions

Define environment and list any two of its four vital functions. (2 marks) [2 marks]

Define environment as total planetary inheritance with biotic and abiotic elements. Then state two functions from: resource supply, waste assimilation, life sustenance, or aesthetic services — provide one sentence per function.

Explain why water has become an economic commodity in India. What does this indicate about the state of India's environment? (5 marks) [5 marks]

First explain: past intensive extraction + pollution degraded rivers/aquifers → water scarcity. Second, connect to carrying capacity concept: extraction rate exceeded regeneration rate. Third, show consequences: high technology costs for extraction/treatment, increased health expenditure from water-borne diseases, government financial burden. Use the 70% pollution statistic in your answer.

Analyse the relationship between exceeding environmental carrying capacity and the emergence of environmental crisis in India. How does this concept justify the need for sustainable development? (6 marks) [6 marks]

Carrying capacity definition: extraction rate ≤ regeneration + waste ≤ absorptive capacity. Show when breached: resources deplete, waste accumulates, life-sustaining function fails → crisis. Use specific Indian examples (70% water pollution, air quality, species extinction). Connect to sustainable development: must align growth within carrying capacity, conserve non-renewable resources, protect renewable resource regeneration. Conclude: past unsustainable path requires conscious shift to balance economic goals with environmental limits.

Assertion-Reason Questions for Environment and Sustainable Development

Q1. Assertion (A):

Environmental problems in the modern era are characterized by exceeding the environment's carrying capacity.

Reason (R):

Rising population and affluent consumption patterns have increased demand for resources and waste generation beyond the environment's regeneration and assimilative capacity.

Answer: A — Both A and R are true, and R is the correct explanation of A — Both the assertion and reason are true, and the reason correctly explains why environmental problems are critical today. The chapter explicitly states that when demand exceeds supply (carrying capacity), environmental crisis results, and identifies population growth and consumption as the causes. This demonstrates complete understanding of the carrying capacity concept.

Q2. Assertion (A):

Renewable resources like forests can be used indefinitely without becoming depleted.

Reason (R):

Renewable resources have a continuous supply available through natural regeneration processes.

Answer: B — Both A and R are true, but R is NOT the correct explanation of A — Both statements are true, but the reason does not adequately explain the assertion. While renewable resources can regenerate, they can still be depleted if extraction exceeds regeneration rate (exceeding carrying capacity). The reason alone doesn't capture the conditional nature—indefinite use is only possible if extraction stays within regeneration rates, which the reason doesn't explicitly state.

Q3. Assertion (A):

Water has become an economic commodity in India.

Reason (R):

Technological advancement in water purification has made water too expensive for common people.

Answer: C — A is true but R is false — The assertion is true—the chapter clearly states water has become an economic good due to pollution and depletion. However, the reason is false. The chapter states that water became an economic commodity because past development has polluted and dried up rivers and aquifers, not because of purification technology costs. The reason confuses cause and effect.

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Case-Based Questions (CBQ) for Environment and Sustainable Development

Case Study:

India's textile industry consumes approximately 10 billion gallons of water annually for dyeing and processing. In Gujarat, a major textile hub, the groundwater table has fallen from 100 meters to 300 meters in the last 20 years due to this intensive extraction. Meanwhile, the annual groundwater recharge in the region is only 8 billion gallons, creating a deficit of 2 billion gallons yearly. The state government has received complaints about reduced agricultural yields and depleted household water supplies. Simultaneously, the textile industry contributes 5% to Gujarat's state GDP and employs over 2 million people.

Q1. According to the passage and chapter concepts, which environmental carrying capacity violation is demonstrated in this scenario?

  • A. Resource extraction exceeds the regeneration rate, violating carrying capacity ✓
  • B. The textile industry has improved environmental standards through water recycling
  • C. Water is renewable and therefore cannot be depleted regardless of extraction rates
  • D. The groundwater table rise indicates sustainable development in the region

Answer: A

Q2. The deficit of 2 billion gallons annually represents which concept from the chapter?

  • A. The absorptive capacity of the environment
  • B. The difference between resource extraction and regeneration, exceeding carrying capacity ✓
  • C. The aesthetic services provided by the environment
  • D. The non-renewable nature of all water resources

Answer: B

Q3. What is the long-term consequence if the current extraction pattern (10 billion gallons) continues while recharge remains at 8 billion gallons?

  • A. Groundwater reserves will eventually be exhausted unless extraction reduces to recharge levels ✓
  • B. The textile industry's contribution to GDP will automatically solve water scarcity
  • C. Agricultural yields will increase due to improved irrigation from deeper wells
  • D. The environmental crisis will have no impact on the state's economic development

Answer: A

Q4. Given that the textile industry provides employment and GDP growth but causes environmental degradation, which approach aligns with sustainable development as discussed in the chapter?

  • A. Completely shut down the textile industry to protect water resources
  • B. Continue current practices since economic growth is the priority
  • C. Reduce water extraction to match or stay below recharge capacity while implementing water-efficient technologies in the industry ✓
  • D. Ignore environmental concerns and maximize extraction for short-term economic gains

Answer: C

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Previous Year Questions (PYQ) for Environment and Sustainable Development

Real CBSE board exam questions from past papers — free to attempt.

CBSE 2026 · Set 58/1/1 · 1 mark

The Montreal Protocol was signed in the year 1987 committing nations to __________.

  • protect biodiversity from any further losses.
  • reduce the impact of global warming.
  • protect ozone layer from depletion incurred due to chlorofluorocarbons.
  • reduce the impact of deforestation.

CBSE 2026 · Set 58/1/1 · 1 mark

"Sustainable development refers to the development that meets the need of the present generation without compromising the ability of the future generations, to meet their own needs." The above mentioned definition has been given by __________.

  • United Nations Conference on Environment and Development
  • United Nations Committee on Environment and Development
  • United Nations Committee on Protection of Environment
  • United Nations Conference on Protection of Environment

CBSE 2026 · Set 58/1/3 · 1 mark

The Montreal Protocol was signed in the year 1987 committing nations to __________. (Choose the correct option to fill in the blank)

  • protect biodiversity from any further losses.
  • reduce the impact of global warming.
  • protect ozone layer from depletion incurred due to chlorofluoro carbons.
  • reduce the impact of deforestation.

CBSE 2026 · Set 58/1/3 · 1 mark

"Sustainable development refers to the development that meets the need of the present generation without compromising the ability of the future generations, to meet their own needs." The above mentioned definition has been given by __________. (Choose the correct option to fill in the blank)

  • United Nations Conference on Environment and Development
  • United Nations Committee on Environment and Development
  • United Nations Committee on Protection of Environment
  • United Nations Conference on Protection of Environment

CBSE 2026 · Set 58/2/1 · 1 mark

Identify that strategy given in the image that can be utilised for sustainable development.

  • Non-conventional source of energy
  • Wind power
  • CNG in urban areas
  • Gobar Gas in rural areas

CBSE 2026 · Set 58/2/1 · 3 marks

Discuss the long term implications of increased demand for environmental resources exceeding their natural regenerative capacity.

CBSE 2026 · Set 58/3/1 · 4 marks

(b) "Traditional knowledge and practices are still applicable in ensuring sustainable development." Do you agree with the given statement? Support your answer with valid reasons.

CBSE 2026 · Set 58/3/1 · 4 marks

(a)(i) "Information Technology plays a very significant role in achieving sustainable development and food security." Justify the given statement with valid arguments.

CBSE 2026 · Set 58/3/1 · 3 marks

In the present times, green investment and sustainability are priorities in public policy. India has emerged as a global leader at the front of climate change. India has pledged to seek solutions for the future. The government has contributed to maintain economic growth by implementing various policies and measures relating to sustainable development. Pradhan Mantri Ujjwala Scheme has actively contributed to cleaner air. The Jal Jeevan Mission was launched with the objective of achieving water security. The greenhouse effect is a natural process that warms the Earth's surface, where certain atmospheric gases, known as greenhouse gases, trap heat from the sun and re-emit it, keeping the planet warm enough to support life. In the present times, the issue of greenhouse gases and rising temperature of the Earth are a global concern.

(a) Discuss any two steps involved in attaining sustainable development in India.

CBSE 2026 · Set 58/3/2 · 4 marks

"Traditional knowledge and practices are still applicable in ensuring sustainable development." Do you agree with the given statement? Support your answer with valid reasons.

CBSE 2026 · Set 58/3/2 · 3 marks

In the present times, green investment and sustainability are priorities in public policy. India has emerged as a global leader at the front of the climate change. India has pledged to seek solutions for the future. The government has contributed to maintain economic growth by implementing various policies and measures relating to sustainable development. Pradhan Mantri Ujjwala Scheme has actively contributed to cleaner air. The Jal Jeevan Mission was launched with the objective of achieving water security. The greenhouse effect is a natural process that warms the Earth's surface, where certain atmospheric gases, known as greenhouse gases, trap heat from the sun and re-emit it, keeping the planet warm enough to support life. In the present times, the issue of greenhouse gases and rising temperature of the Earth are a global concern.

Discuss any two steps involved in attaining sustainable development in India.

CBSE 2026 · Set 58/3/2 · 4 marks

"Information Technology plays a very significant role in achieving sustainable development and food security." Justify the given statement with valid arguments.

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