Environment and Sustainable Development
Economic development so far has come at the heavy cost of environmental quality, and the chapter argues for shifting to a path of sustainable development that lives within the environment's carrying capacity.
A perennial Prelims favourite — expect direct questions on the four functions of environment, renewable vs non-renewable resources, the CPCB (1974), and matching the Montreal and Kyoto protocols to their issues. For Mains it anchors GS-III themes of environmental pollution, conservation, resource depletion and sustainable development, supplying ready examples (Chipko/Appiko, Damodar Valley) and the poverty–affluence dichotomy. The constitutional hooks (Articles 48A, 51A(g)) also feed GS-II governance angles.
Understand the chapter
What is Environment?
Environment is defined as the total planetary inheritance and the totality of all resources. It comprises biotic (living) and abiotic (non-living) elements that continuously influence one another, so studying the environment means studying the inter-relationship between them. Left to itself the environment can support life for millions of years; the single most disruptive element is the human species, which with modern technology can cause far-reaching and often irreversible changes.
- Biotic: birds, animals, plants, forests, fisheries — all living elements.
- Abiotic: air, water, land, rocks, sunlight — non-living elements.
- Environment = total planetary inheritance + totality of all resources.
The Four Functions of Environment
The environment is central to economic life because it performs four vital functions. It can perform them uninterrupted only as long as demand stays within its carrying capacity — that is, resource extraction does not exceed the rate of regeneration and waste stays within the assimilative capacity. When the third function (life sustenance) fails, an environmental crisis results.
- Supplies resources — renewable (trees, fish) and non-renewable (fossil fuels).
- Assimilates/absorbs waste.
- Sustains life by providing genetic and bio-diversity.
- Provides aesthetic services like scenery.
Carrying Capacity, Absorptive Capacity and the Crisis
An environmental crisis arises when demand crosses carrying capacity: extraction exceeds regeneration and waste exceeds absorptive (assimilative) capacity, so the environment fails its life-sustaining function. Before industrialisation and the population explosion, demand for environmental resources was below supply, so pollution stayed within absorptive capacity and problems did not arise. Population explosion plus the Industrial Revolution reversed this supply–demand relationship for environmental quality, leaving demand high but supply limited by overuse and misuse.
- Carrying capacity: resource extraction stays within the regeneration rate and waste within the assimilative capacity.
- Absorptive capacity: the environment's ability to absorb degradation.
- Past development polluted and dried up rivers, making water an economic good; 70% of India's water is polluted.
- Opportunity costs of negative environmental impacts are high — rising health and resource-exploration costs.
Global Environmental Issues: Global Warming and Ozone Depletion
Two global issues add to the government's financial burden. Global warming is the gradual rise in the average temperature of the earth's lower atmosphere from greenhouse gases since the Industrial Revolution, largely human-induced through fossil-fuel burning and deforestation. Ozone depletion is the reduction of ozone in the stratosphere caused by chlorine and bromine compounds (CFCs, halons), which lets in more UV radiation that causes skin cancer and harms phytoplankton and plants.
- Since 1750: CO2 up 31% and CH4 up 149% above pre-industrial levels; temperature up 0.6°C (1.1°F) in the past century.
- Kyoto Conference (Japan, 1997) called for GHG emission cuts by industrialised nations.
- Ozone fell about 5% from 1979 to 1990; the Montreal Protocol banned CFCs and other ozone-depleting chemicals.
- Global warming: lower atmosphere, Kyoto, CO2/CH4; Ozone: stratosphere, Montreal, CFCs/halons — do not swap.
State of India's Environment
India is resource-rich — fertile Indo-Gangetic plains, cotton-friendly black soil of the Deccan Plateau, forests, and minerals including nearly 8% of world iron-ore reserves — yet development has strained its finite resources and harmed health. India's threat is a dichotomy: poverty-induced degradation on one side and pollution from affluence and a fast-growing industrial sector on the other. Five priority issues have been identified.
- Priority issues: land degradation, biodiversity loss, air pollution (especially vehicular in cities), fresh-water management, solid-waste management.
- India supports 17% of world's humans and 20% of livestock on just 2.5% of world's geographical area.
- Per capita forest land only 0.06 ha vs 0.47 ha needed; about 15 million cubic metre excess felling; soil erosion of 5.3 billion tonnes/year.
- Damodar Valley: heavy industry is turning the Damodar river into an ecological disaster.
Environmental Governance and People's Movements
To tackle water and air pollution the government set up the Central Pollution Control Board (CPCB) in 1974, followed by State Pollution Control Boards, which lay down effluent/emission standards, monitor air and water quality, and run awareness programmes. Constitutionally, the environment is safeguarded through Directive Principles and Fundamental Duties, while community action has historically driven conservation. The Chipko movement protected Himalayan forests, and its Karnataka counterpart Appiko ('to hug') saved 12,000 trees.
- CPCB (1974) under the Water (Prevention and Control of Pollution) Act, 1974; Air Act 1981; umbrella Environment (Protection) Act, 1986.
- Article 48A (DPSP) and Article 51A(g) (Fundamental Duty) mandate protecting the environment; Article 21 read to include a clean environment.
- Chipko — Himalayas; Appiko — Salkani forest, Sirsi, Karnataka, from 8 September 1983, saved 12,000 trees.
- MoEFCC is the nodal ministry.
Sustainable Development
Sustainable development is the chapter's destination: meeting the needs of the present generation without compromising the ability of future generations to meet their own needs (Brundtland Commission, 'Our Common Future', 1987). It means living within the environment's carrying capacity and ensuring intergenerational equity, rather than treating growth and environment as a permanent trade-off. The strategy thrust is a shift towards non-conventional, cleaner resources and traditional, eco-friendly practices.
- Core idea: intergenerational equity plus staying within carrying capacity.
- Strategies: non-conventional energy (solar photovoltaic, wind, mini-hydel), LPG/gobar (bio) gas in rural areas, CNG in urban transport.
- Promote traditional knowledge, bio-composting and bio-pest control over chemical-intensive farming.
Key terms
- Environment
- Total planetary inheritance and totality of all resources — all biotic and abiotic factors influencing each other.
- Biotic vs Abiotic
- Biotic = living elements (plants, animals, forests, fisheries); Abiotic = non-living (air, water, land, rocks, sunlight).
- Renewable resources
- Resources with a continuous supply that need not be depleted if used within the regeneration rate — e.g., trees, fish.
- Non-renewable resources
- Resources that get exhausted with extraction and use — e.g., fossil fuels.
- Carrying capacity
- State where resource extraction stays within the regeneration rate and waste stays within the assimilative capacity.
- Absorptive capacity
- The environment's ability to absorb degradation and waste.
- Sustainable development
- Development that meets present needs without compromising future generations' ability to meet theirs (Brundtland, 1987).
- Global warming
- Gradual rise in the earth's lower-atmosphere temperature due to greenhouse gases since the Industrial Revolution.
- Ozone depletion
- Reduction of stratospheric ozone caused by CFCs and halons, increasing harmful UV radiation reaching earth.
- Land degradation
- Decline in land quality from deforestation, overgrazing, shifting cultivation, agro-chemicals and groundwater over-extraction.
Must-know facts exam-ready
- Environment performs four functions: supplies resources, assimilates waste, sustains life (genetic/bio-diversity), and provides aesthetic services.
- Seventy per cent (70%) of water in India is polluted.
- Since 1750, CO2 rose 31% and methane (CH4) rose 149% above pre-industrial levels; temperature rose 0.6°C (1.1°F) in the past century.
- The ozone layer reduced by about 5% between 1979 and 1990.
- Montreal Protocol bans CFCs and ozone-depleting chemicals; Kyoto Conference (Japan, 1997) targets GHG cuts by industrialised nations.
- India holds nearly 8% of the world's total iron-ore reserves.
- India supports 17% of world's human and 20% of livestock population on just 2.5% of world's geographical area.
- Per capita forest land is only 0.06 hectare against a requirement of 0.47 hectare.
- Soil is eroded at 5.3 billion tonnes/year; annual nutrient loss includes 0.8 mt nitrogen, 1.8 mt phosphorus and 26.3 mt potassium.
- CPCB was set up in 1974 under the Water (Prevention and Control of Pollution) Act, 1974; State Pollution Control Boards followed.
- Appiko ('to hug') began 8 September 1983 in Salkani forest, Sirsi (Karnataka) and saved 12,000 trees; Chipko protected Himalayan forests.
- Constitution: Article 48A (DPSP) and Article 51A(g) (Fundamental Duty) protect the environment.
Timeline
- 1974Central Pollution Control Board (CPCB) established under the Water Act, 1974.
- 1979–1990Ozone layer detected to have reduced by about 5%.
- 1983Appiko movement begins (8 September, Salkani forest, Karnataka), saving 12,000 trees.
- 1986Environment (Protection) Act enacted as umbrella environmental legislation.
- 1987Brundtland Report 'Our Common Future' defines sustainable development; Montreal Protocol adopted on ozone.
- 1997Kyoto Conference on Climate Change (Japan) calls for GHG emission cuts.
Memory tricks remember it for good
Traps to avoid
- Renewable does not mean inexhaustible: renewable resources (trees, fish) CAN be depleted if extraction exceeds the regeneration rate.
- Do not swap global warming (lower atmosphere, CO2/CH4, Kyoto) with ozone depletion (stratosphere, CFCs/halons, Montreal).
- Carrying capacity (extraction within regeneration and waste within assimilation) is related to but not identical with absorptive capacity (ability to absorb degradation).
- Chipko = Himalayas; Appiko = Karnataka and means 'to hug' — do not interchange the region or the meaning.
- CPCB was set up in 1974 (Water Act), not 1981 (Air Act) or 1986 (EPA).
- Article 48A is a Directive Principle (State's duty) while Article 51A(g) is a Fundamental Duty (citizen's duty) — do not mix them up.
Exam focus
🧠 Prelims angles
- Four functions of environment and the renewable vs non-renewable resource classification.
- CPCB establishment year (1974) and its parent law (Water Act, 1974).
- Matching protocols: Montreal–ozone/CFC vs Kyoto (1997)–greenhouse gases.
- Chipko vs Appiko — region, meaning ('to hug') and year (1983).
- Constitutional provisions: Articles 48A, 51A(g) and the Article 21 link to environment.
- Signature data points: 70% water polluted; 17% humans/20% livestock on 2.5% land; per-capita forest land 0.06 vs 0.47 ha.
✍️ Mains angles GS-III
- India's environmental threat is a dichotomy of poverty-induced degradation and affluence-driven pollution — discuss.Define the dichotomy; develop both arms with examples (fuelwood/overgrazing vs industrial/vehicular pollution); conclude with sustainable development.
- India's economic development has come at a heavy environmental cost — examine through the lens of sustainable development.Use carrying/absorptive capacity and opportunity-cost framing; anchor in the Brundtland definition; suggest non-conventional energy and cleaner practices.
- People's participation is central to environmental conservation — substantiate.Use Chipko and Appiko as community-led models; link to decentralised forest governance and consultation before felling.
Last-minute revision tick as you recall
- Environment = total planetary inheritance; biotic + abiotic, studied as their inter-relationship.
- Four functions: supply resources, assimilate waste, sustain life, aesthetics (mnemonic SAGA).
- Crisis = demand above carrying capacity; extraction above regeneration, waste above absorption.
- 70% of India's water polluted; water has become an economic good.
- Global warming: lower atmosphere, CO2/CH4, Kyoto 1997. Ozone: stratosphere, CFCs, Montreal.
- India: 17% humans + 20% livestock on 2.5% land; forest land 0.06 vs 0.47 ha needed.
- CPCB 1974 (Water Act); Article 48A (DPSP) and 51A(g) (Fundamental Duty).
- Chipko (Himalayas) and Appiko (Karnataka, 'to hug', 1983, 12,000 trees saved).
- Sustainable development = present needs without compromising the future (Brundtland, 1987).
Distilled from NCERT Class 11 · Indian Economic Development for UPSC. Always cross-check facts with the original NCERT.