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Class 8 Social Science

Exploring Society I · Chapter 1 — Natural Resources and Their Use

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Overview

Everything we use, from a wooden chair to a plastic button, can be traced back to Nature. This chapter asks when a part of Nature becomes a resource and how we should use it. You will learn the three conditions that make something a resource: we must be able to reach it, afford to use it and accept its use as a society. You will sort resources in two ways, by use (essential for life, materials, energy) and by whether Nature can replace them (renewable and non-renewable). You will see how Nature restores and regenerates itself in cycles without waste, and how the benefits we receive from this are called ecosystem services. The chapter then looks at the uneven spread of resources across India and the world, the jobs and the conflicts this brings, the sharing of rivers such as the Kaveri, and the surprising paradox of plenty. Caselets on Punjab's falling groundwater and on cement pollution show the cost of overuse, while Vṛikṣhāyurveda, Sikkim's organic farms and India's solar parks show what wise use, or stewardship, looks like.

हिंदी में पढ़ें

एक्सप्लोरिंग सोसाइटी: इंडिया एंड बियॉन्ड भाग 1 का यह अध्याय बताता है कि प्राकृतिक संसाधन क्या हैं, उनका वर्गीकरण कैसे होता है, उनका असमान वितरण हमारे जीवन को कैसे प्रभावित करता है और हम उनका बुद्धिमानी से उपयोग कैसे कर सकते हैं।

Learning Objectives

  • Explain when a part of Nature becomes a resource using three conditions
  • Classify natural resources by use and as renewable or non-renewable
  • Explain restoration, regeneration, ecosystem functions and ecosystem services
  • Describe how overuse can turn a renewable resource into one that runs out
  • Explain why non-renewable resources such as coal must be used judiciously
  • Describe the effects of the uneven distribution of resources, including the paradox of plenty
  • Analyse the Punjab groundwater caselet and the costs of overexploitation
  • Give examples of stewardship from traditional knowledge, Sikkim and renewable energy

Topics in this chapter

8 topics · tap a topic title to jump straight to it.

Topic 1 of 8
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When does Nature become a resource?

By the end you canExplain when something in Nature becomes a resource, using the three conditions.

1Think first

Is petroleum lying under the deep ocean floor a resource today?No wrong answer. Think for a moment, then read on.

2The idea, in plain words

Pick up anything near you: a pencil, a steel tumbler, a cotton shirt, even a plastic button. Ask where it came from, and then where that came from. Sooner or later every chain of answers ends in Nature: a tree, a rock, a field, an oil well under the sea.

Nature and resources. One meaning of the word Nature is everything living and non-living around us that humans did not make: rivers, air, soil, forests, rocks, animals. A part of Nature becomes a resource when people use it to live, or turn it into something they need. A tree standing in a forest is simply part of Nature. When its wood is cut and made into a table, we are treating the tree as a resource.

Three conditions. Something in Nature is not a usable resource just because it exists. It must pass three tests:

  • Technologically accessible: we must have the tools to reach and use it. Petroleum lying very deep below the ocean floor is not a resource for us until we can drill that deep.
  • Economically feasible: the cost of getting it out must make sense. If extracting a mineral costs more than it is worth, nobody will extract it.
  • Culturally acceptable: society must agree to its use. Many communities protect sacred groves, patches of forest where trees are never cut. Those trees are not treated as timber.

A note on a word. In daily speech, exploitation sounds bad. In geography and economics it also has a neutral meaning: taking out, using and consuming a natural resource.

Obvious and hidden treasures. Some resources are easy to notice: water, air and soil. Others are hidden and took millions of years to form: coal, petroleum, metal ores, precious stones. Humans have slowly learnt to find and use them.

Nature as a nurturer. In many traditions in India and around the world, Nature is seen as sacred, a mother who feeds and protects. Daily customs such as worshipping the tulasī plant or offering water to the Sun express gratitude rather than ownership. Such attitudes affect how carefully a community uses what Nature gives.

So, a definition. Natural resources are materials and substances that occur in Nature and are valuable to humans. Whether a thing counts as a resource can change over time: new technology, new prices or new customs can turn a useless thing into a resource, or the other way round.

Formulas to remember
  1. Resource = part of Nature + technologically accessible + economically feasible + culturally acceptable
Whennew technology lets us reach a materialThenit can become a resource
Whena community considers a forest sacredThenits trees are not used as timber even though they could be

3Worked example

A village has a rich deposit of clay, but the nearest road is far away and transport costs more than the clay is worth. Is the clay a resource right now?
Step 1Technology: digging clay is easy, so this test is passed.
Step 2Cost: transport costs more than the clay earns, so it is not economically feasible.
Step 3So, for now, the clay is not a usable resource; a new road could change that.
More examples
  • A standing tree is part of Nature; its wood made into furniture is a resource.
  • Oil far below the seabed becomes a resource only when drilling technology can reach it.
  • Trees in a sacred grove are not cut, so they are not used as timber.

4Your turn

Which condition is NOT met when trees in a sacred grove are left uncut?

5Remember this

One line to keepA part of Nature becomes a resource only when we can reach it, can afford to use it, and society accepts its use.
Common mistake. Thinking that everything in Nature is automatically a resource; it must also be reachable, affordable and acceptable.
Topic 2 of 8
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Categories of natural resources: by use

By the end you canSort natural resources by their use into life, materials and energy.

1Think first

Into which group would you put the water of a mountain stream?No wrong answer. Think for a moment, then read on.

2The idea, in plain words

In science you sort living and non-living things into groups. The moment someone says 'living thing', you know what is meant. Sorting things into named groups, or categories, saves time and helps people talk clearly. We can sort natural resources in the same way.

Choosing a criterion. Before sorting, we choose a criterion, a shared feature that decides which group a thing goes into. One useful criterion is what we use the resource for. This gives three groups.

1. Resources essential for life. Air to breathe, water to drink and food to eat. We take air from the atmosphere, water from rivers, ponds and wells, and food from soil and other living things. No factory can make these in the amounts we need. We cannot manufacture the air we breathe or the soil that grows our grain.

2. Resources for materials. People shape Nature's gifts into useful and beautiful objects. A block of wood may become a chair, or be carved into a small statue. Marble becomes floors and temples, clay becomes pots and bricks, iron ore becomes steel, and gold becomes jewellery. India's varied land, from mountains to coasts, gives it a wide range of such materials, from timber and marble to coal and gold.

3. Resources for energy. Modern life runs on energy: electricity for homes, schools and hospitals, fuel for buses and trains, and power for factories. This energy comes from coal, petroleum, natural gas, flowing water, sunlight and wind.

CategoryWhat it does for usExamples
Essential for lifeKeeps us aliveAir, drinking water, soil for food
MaterialsBecomes objects we useWood, marble, clay, iron ore, gold
EnergyPowers homes, transport, industryCoal, petroleum, gas, sunlight, wind, flowing water

One resource, many groups. The same resource can sit in more than one category. Water is essential for life, but flowing water also turns turbines in a small hydel plant, like the microhydel plants of Himachal Pradesh. Wood can be a material (furniture) or an energy source (firewood). Categories describe uses, not fixed labels.

Another criterion. We can also sort resources by whether Nature can replace them. This gives the groups renewable and non-renewable, which you will study next. Using two criteria together gives a fuller picture: coal, for example, is an energy resource that is non-renewable.

Formulas to remember
  1. Criterion 1 (use): life, materials, energy
  2. Criterion 2 (replacement): renewable, non-renewable
Whenwe change the criterionThenthe same resources fall into different categories
Whena resource has several usesThenit can belong to more than one category

3Worked example

Sort these by use: natural gas, drinking water, granite, sunlight, cotton.
Step 1Essential for life: drinking water.
Step 2Materials: granite (buildings), cotton (cloth).
Step 3Energy: natural gas and sunlight.
More examples
  • Air and drinking water: essential for life.
  • Marble and timber: resources for materials.
  • Sunlight, wind and coal: resources for energy.
  • Water from a stream used in a microhydel plant: water as energy.

4Your turn

Firewood belongs to which category of use?

5Remember this

One line to keepSorting resources by use gives three groups: essential for life, materials and energy, and one resource can fit more than one.
Common mistake. Treating categories as fixed labels; the category depends on how the resource is used.
Topic 3 of 8
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Nature's cycles: restoration, regeneration and ecosystem services

By the end you canExplain restoration, regeneration and the difference between ecosystem functions and services.

1Think first

Who 'cleans up' a forest when a tree falls?No wrong answer. Think for a moment, then read on.

2The idea, in plain words

A cut on your knee heals in a week without your doing anything. A forest burnt by a wildfire grows green again after a few years. These are signs of a deep principle: Nature repairs and renews itself.

Two key words. Restoration means returning something to its original healthy state after damage. Regeneration goes a step further: it is Nature's power to create new life and the conditions in which life can thrive.

A cycle with no waste. Follow a tree in a forest. It grows, gives fruit and shade, and one day falls. Bacteria, fungi and insects feed on the fallen trunk and break it down. The broken-down wood becomes part of the soil and makes it richer. Seeds sprout in that soil, new trees grow, and in time they too will fall. Nothing is wasted: the end of one life feeds the next.

Helping Nature heal. When people replant a cleared area with the kinds of trees that originally grew there, the ecosystem comes back. The trees feed and shelter birds, squirrels and insects, and life returns. Planting the right native trees matters, because the local creatures depend on them.

Ecosystem functions and services. Nature does many jobs on its own. A forest filters rainwater, holds soil in place and gives animals a home. These are ecosystem functions. When humans benefit from them, for example clean water in our wells, farmland that is not washed away, or crops pollinated by bees, we call them ecosystem services. Honey from a beehive and oxygen from trees are further examples.

Counting the oxygen. A mature tree gives out roughly 275 litres of oxygen a day (the figure varies with the kind of tree). A person needs roughly 350 litres a day, more if they are very active. So one person needs the oxygen output of more than one big tree: 350 ÷ 275 ≈ 1.3 trees. A town of 10,000 people would need the daily output of about 12,700 such trees. Numbers like these show how much we depend on services we never pay for.

Gentle farming. Ploughing lightly disturbs the small living world under the ground less and keeps moisture in the soil. Practices that work with Nature's cycles keep the services flowing.

Formulas to remember
  1. One person's oxygen need ÷ one tree's output = 350 ÷ 275 ≈ 1.3 trees
Whena natural process benefits humansThenwe call it an ecosystem service
Whennative trees are replanted on cleared landThenfood and shelter return and the ecosystem regenerates

3Worked example

Using the book's figures (tree: about 275 L of oxygen a day; person: about 350 L a day), how many mature trees supply a family of 4?
Step 1Family need = 4 × 350 = 1,400 litres a day.
Step 2Trees needed = 1,400 ÷ 275 ≈ 5.1.
Step 3So about 5 mature trees, a little more for active people.
More examples
  • A fallen tree rots, enriches the soil and feeds new seedlings.
  • A forest filters water and stops soil erosion (functions); we get clean water and safe farmland (services).
  • Bees pollinate crops; honey is also a service.

4Your turn

Which is an ecosystem SERVICE rather than just a function?

5Remember this

One line to keepNature restores and regenerates itself in cycles with no waste, and the benefits we get from its work are ecosystem services.
Common mistake. Mixing up functions (what Nature does) with services (the benefit humans receive).
Topic 4 of 8
⛏️4

Renewable resources and the condition for staying renewable

By the end you canExplain what makes a resource renewable and how overuse can make it run out.

1Think first

Can a forest ever run out if trees grow back?No wrong answer. Think for a moment, then read on.

2The idea, in plain words

Sunlight falls on most of India almost all year. Rivers are fed every year by rain and melting glaciers. Forests grow back, and soil slowly rebuilds itself. Resources that Nature keeps replacing are called renewable resources: solar energy, wind energy, energy from flowing water, and timber from forests.

The big condition. A renewable resource stays renewable only if we do not break Nature's rhythm of restoration and regeneration. If timber is cut faster than the forest can grow new trees, the forest shrinks and finally disappears. Renewable does not mean unlimited; it means replaceable at Nature's speed.

Example 1: glaciers and rivers. Scientists have shown that several human actions, among them industry that burns fossil fuels and clearing forests for farms and other uses, together contribute to rising temperatures. In parts of the Himalaya, glaciers now melt faster than snowfall can rebuild them. The Himalaya acts as a 'water tower' for the plains. If the glaciers shrink, the rivers that millions of people depend on become less reliable. River water is renewable only as long as glaciers and forests last.

Example 2: fish. Many fishing communities traditionally stopped or reduced fishing during the spawning season, when fish lay eggs, so that fish numbers stayed healthy. Large-scale commercial fishing ignored such limits. The tuna, a large fish that keeps the ocean food chain in balance by eating smaller fish and shrimps, declined so sharply that countries signed agreements to control tuna fishing. Even so, its numbers are still falling.

Example 3: polluted rivers. Factories make the goods we use, but often release untreated waste into rivers. Much of this waste cannot be broken down and used as food by any living thing. Instead of joining Nature's cycle, it poisons it, and the river can no longer support life. Clean water, a renewable resource, is lost.

ResourceHow Nature renews itHow we can break the rhythm
Forest timberTrees regrowCutting faster than regrowth
River waterRain and glacier meltWarming that shrinks glaciers; pollution
FishBreeding each seasonFishing during spawning; overfishing

The lesson. We can use renewable resources for a very long time, but only by taking less than Nature can replace.

Formulas to remember
  1. Stays renewable when: rate of use ≤ rate of natural renewal
  2. Depletes when: rate of use > rate of natural renewal
Whenwe take a renewable resource faster than Nature replaces itThenit is depleted and stops being renewable in practice
Whenuntreated factory waste enters a riverThenthe river's natural cycle is broken and it cannot support life

3Worked example

A forest grows about 1,000 new trees a year. A village cuts 1,500 trees a year. What will happen, and what is the safe limit?
Step 1Each year the forest loses 1,500 − 1,000 = 500 more trees than it gains.
Step 2The forest will shrink every year and finally be used up.
Step 3The safe limit is cutting no more than about 1,000 trees a year, the rate of regrowth.
More examples
  • Timber taken in limited amounts from a forest that is allowed to regrow.
  • Himalayan glaciers melting faster than snowfall replaces them.
  • Traditional pause in fishing during spawning; decline of tuna after overfishing.

4Your turn

Why did many communities stop fishing in the spawning season?

5Remember this

One line to keepA renewable resource lasts only if we use it no faster than Nature can restore it.
Common mistake. Believing renewable means unlimited; overuse can exhaust even a renewable resource.
Topic 5 of 8
⛏️5

Non-renewable resources and their careful use

By the end you canDefine non-renewable resources and explain why they must be used judiciously.

1Think first

If coal forms naturally, why do we call it non-renewable?No wrong answer. Think for a moment, then read on.

2The idea, in plain words

Coal in a mine today began as plants that lived and died hundreds of millions of years ago. Buried under layers of rock, they slowly turned to coal. Once we burn a lump of coal, Nature will not make another one on any time scale that matters to us.

Definition. Non-renewable resources form over very long periods and cannot be replaced as fast as we use them. They include:

  • Fossil fuels: coal, petroleum and natural gas.
  • Minerals and metals: iron, copper, gold, bauxite and others, taken from ores in the ground.

India and coal. India has large coal reserves, and much of our electricity is made by burning coal. But one estimate quoted in the textbook suggests that India's coal may last only about another 50 years. At the same time, demand for electricity keeps rising, because the population is growing and development work is speeding up. A student in Class 8 today will be in their early sixties around the time such an estimate runs out.

Why careful use matters. Until cleaner options are widely available, we still need coal, so we must use it judiciously, with good judgement and without waste. Careful use buys time for humanity to develop alternatives.

Renewable versus non-renewable.

FeatureRenewableNon-renewable
Replaced by Nature?Yes, if used wiselyNo, not in human time
ExamplesSunlight, wind, flowing water, timberCoal, petroleum, iron, copper, gold
Main riskUsing faster than renewalRunning out completely
Best practiceUse within Nature's rateUse carefully; shift to renewables

Daily life check. You use non-renewable resources every day, often without noticing. Electricity from a coal power station lights your room; petrol or diesel runs the bus to school; plastic is made from petroleum; your steel lunch box came from iron ore. Many have renewable substitutes: solar panels on the roof, an electric bus charged from solar or wind power, cloth bags instead of plastic ones.

Steps toward renewables. Switch off lights and fans when not needed, use public transport or a cycle, choose solar water heaters, and reuse and recycle metals. Each step makes the remaining non-renewables last longer.

Formulas to remember
  1. Non-renewable: formation time is millions of years, so replacement rate ≈ 0 for humans
Whendemand for electricity rises while coal reserves are fixedThenthe reserves run out sooner unless we save energy or switch to renewables
Whenwe recycle metalsThenless new ore needs to be mined

3Worked example

A town gets electricity from coal. Suggest three ways to reduce its use of this non-renewable resource.
Step 1Cut waste: switch off lights, fans and machines when not in use.
Step 2Add renewables: solar panels on rooftops and a small wind or solar farm.
Step 3Use energy-efficient appliances and LED bulbs so the same work needs less coal-fired power.
More examples
  • Coal, petroleum and natural gas are fossil fuels.
  • Iron, copper and gold are non-renewable metals.
  • India's coal reserves may last about another 50 years, by one estimate in the textbook.

4Your turn

Which of these is non-renewable?

5Remember this

One line to keepNon-renewable resources cannot be replaced in human time, so we must use them carefully while shifting to renewables.
Common mistake. Thinking non-renewable resources are never formed; they do form, but far too slowly to replace what we use.
Topic 6 of 8
⛏️6

Uneven distribution of resources and its effects

By the end you canDescribe how the uneven spread of resources affects settlement, trade, sharing and prosperity.

1Think first

Why is a country full of oil not always a rich country?No wrong answer. Think for a moment, then read on.

2The idea, in plain words

Iron ore is mined in a few districts of Odisha, Jharkhand, Chhattisgarh, Karnataka and Goa; crude oil comes from places such as Assam, Gujarat and the sea off Mumbai. Your own district may have neither. Natural resources are spread unevenly across the planet and even within one country.

Why this matters. Where resources lie shapes where people settle, what they trade, how countries deal with each other, and sometimes where wars are fought. Many wars in history, and some today, have been about controlling resources.

Benefits near the resource. When an industry is set up close to a mine or a forest, local people find jobs. A township grows around it, with shops, schools and hospitals, and modern facilities reach the area.

Costs near the resource. The same development can carry heavy costs, now and later. In many parts of the world, people living in resource-rich areas have been moved from their homes to make way for mines, dams or factories. Sometimes their sacred places are threatened, which leads to conflict. Pollution and loss of forests may last long after the mine closes.

Trade and skill. Resources plus human skill can create products known across the world. In ancient India, iron ore and the knowledge of smiths produced Wootz steel, prized far beyond India's borders. Trade in such goods helped large empires grow.

Rivers do not respect borders. Nature ignores political boundaries, so sharing creates tension. The waters of the Kaveri are shared by Karnataka, Tamil Nadu, Kerala and Puducherry, and keeping the peace has needed long negotiations and careful management. The Mettur dam in Tamil Nadu is one of the structures on this river. Between countries, agreements are harder still. The Brahmaputra, for example, flows through more than one country before reaching the sea.

The paradox of plenty. Surprisingly, having lots of resources does not make a country rich. Some resource-rich regions grow more slowly than others. Economists call this the resource curse or the paradox of plenty. A common reason is that such places sell raw materials cheaply and fail to build industries that turn them into higher-value products. Knowledge, good governance and planning decide whether a resource becomes a lasting benefit or a short windfall. India has largely avoided this curse by building industries to meet its own needs. You will see why in the chapter 'Factors of Production'.

Formulas to remember
  1. Resource + skill + capital + good governance → lasting prosperity
  2. Resource alone, sold raw → risk of the paradox of plenty
Whena river flows through several statesThenits water must be shared by agreement, which can cause tension
Whena region exports only raw resources and builds no industryThenit may stay poor despite its wealth of resources

3Worked example

A district has a large bauxite deposit. List one benefit and two possible costs of opening a mine, and one way to reduce the costs.
Step 1Benefit: local jobs and a growing township with services.
Step 2Costs: families may be displaced; forests and rivers may be polluted.
Step 3Reduce costs: fair resettlement and consent of local people, strict pollution rules and replanting after mining.
More examples
  • Jobs and a new township grow around a mine.
  • Kaveri water shared by Karnataka, Tamil Nadu, Kerala and Puducherry.
  • Wootz steel: Indian iron plus skill made a world-famous product.

4Your turn

What does the 'paradox of plenty' mean?

5Remember this

One line to keepResources are unevenly spread, which shapes jobs, trade, sharing disputes and prosperity, but plenty alone does not guarantee wealth.
Common mistake. Assuming a resource-rich region must be wealthy; what people build with the resource matters more.
Topic 7 of 8
🌍7

Overexploitation: groundwater, soil and cement

By the end you canExplain how overuse of groundwater, soil and polluting industry harms long-term wellbeing, using the Punjab caselet.

1Think first

Why does a farmer's tube well need to go deeper every few years?No wrong answer. Think for a moment, then read on.

2The idea, in plain words

In many villages a tube well that once found water at 10 metres now has to go down 30 metres or more. Each year the pump works harder and the electricity bill rises. This is what overusing a renewable resource looks like.

Groundwater. Many farmers in India pump groundwater for irrigation. In most states, water is taken out faster than rain can refill the underground store. The gap adds up year after year: pumping costs rise, and finally the water may run out. Many growing cities may soon face the same problem. Remedies include traditional rainwater harvesting, reviving ponds and tanks, cutting waste, and treating and reusing water.

Caselet: Punjab. Punjab was the home of the Green Revolution, which helped India grow enough grain to feed itself. The story of what followed shows the cost:

  • In the 1960s farmers switched to high-yielding varieties of wheat and paddy, which needed far more water than traditional seeds.
  • Farmers pumped groundwater to meet this need, and free electricity for farm pumps encouraged over-pumping.
  • Chemical fertilisers and pesticides were used heavily.
  • Result: over a large part of the state, groundwater can no longer be reached until a depth of about 30 metres, and dissolved chemicals in it harm health.
  • Almost 80% of Punjab's area is classed as over-exploited: water is drawn much faster than it can be restored.

Food security was won for the short term, but healing the damage will take a long time. The problem is not limited to Punjab.

Soil. Wrong use of chemical fertilisers and pesticides has degraded soil, and crops fail on worn-out land. Traditional farming treated soil as part of Mother Earth and used cow dung and other natural manures, mulching (covering soil with plant material) and multi-cropping (several crops together). Learning from these can help rebuild soil.

Cement. Homes, schools, roads and airports all need cement, yet its production is listed among the most polluting industries. Fine dust enters the lungs of people and animals, settles on leaves and lowers crop yields, and pollutes soil and water. The Central Pollution Control Board has set guidelines to reduce this. Builders are also turning to alternatives: stone and mud (Jaisalmer fort was first built of mud in the 12th century), plant-based materials and recycled plastic. The Auroville Earth Institute makes modern buildings from mud using special techniques.

Formulas to remember
  1. Groundwater falls when: water pumped out > water recharged by rain
Whenhigh-yield crops need more water and electricity is freeThenfarmers over-pump and the water table falls
Whenchemical fertilisers are overusedThensoil degrades and chemicals seep into groundwater

3Worked example

Trace the chain of causes that led to Punjab's groundwater crisis.
Step 11960s: high-yielding wheat and paddy needing more water.
Step 2Groundwater pumped to meet the need; free power encouraged over-pumping.
Step 3Pumping exceeded recharge year after year, so the water table fell (out of reach to about 30 m in large parts).
Step 4Fertiliser and pesticide chemicals dissolved into the water; about 80% of the area is now over-exploited.
More examples
  • Punjab: about 80% of area over-exploited; water out of reach to about 30 m in large parts.
  • Free farm power encouraged over-pumping.
  • Cement dust harms lungs and lowers crop yields; mud buildings are an alternative.

4Your turn

What share of Punjab's area is classed as over-exploited for groundwater?

5Remember this

One line to keepTaking more than Nature can restore brings short-term gains but long-term damage, as Punjab's groundwater shows.
Common mistake. Blaming only farmers; seeds, free power and policies together caused over-pumping.
Topic 8 of 8
⚔️8

Stewardship: wise use, traditional knowledge and renewable energy

By the end you canDescribe stewardship and give examples from traditional knowledge, Sikkim and solar energy.

1Think first

Why did yields fall at first when Sikkim's farms went organic?No wrong answer. Think for a moment, then read on.

2The idea, in plain words

A good steward looks after something that belongs to everyone, including people not yet born. Stewardship of natural resources means using renewable resources so they can restore and regenerate, and using non-renewable ones carefully. Scientists warn that careless use has caused pollution, biodiversity loss (a fall in the variety of life on Earth) and climate change, all happening faster in recent years.

Old knowledge: Vṛikṣhāyurveda. This ancient Indian science of plants and trees (from vṛikṣha, tree, and āyurveda, science of life) was set down in texts such as Surapala's Vṛikṣhāyurveda, around the 10th century CE. It advises which plants suit which soils, how to collect, store and treat seeds, how much to water at each stage and season, how to keep pests away with natural repellents and companion plants, and how to plough so the soil keeps moisture and stays alive with fungi, bacteria and earthworms. It supports crop rotation and mixed cropping.

Caselet: Sikkim goes organic. A farming family in Sikkim faced falling yields and growing debts from costly chemicals. When the state promoted organic farming, they switched to compost, natural pest sprays made from neem and garlic, and several crops through the year. At first yields fell as the soil recovered. After about five years the farm was thriving, selling cardamom, ginger and traditional vegetables at good prices. In 2016 Sikkim became a fully organic state, with all its farmland certified. Insects and birds returned, tourism grew, and farmers' incomes rose by about 20% on average.

Switching to renewable energy. For non-renewables, the aim is to make them last until better options are ready, which means moving to renewables wherever we can. One of the world's largest solar parks, in Rajasthan, can generate enough electricity for about 15% of the state's present needs, and the Bhadla Solar Park has become a symbol of India's solar plans. In 2015 India and France launched the International Solar Alliance, a group of sunshine-rich countries working together on solar power. India has helped direct large investment into solar projects in developing countries and shared its technical know-how.

Fair access. Resources are not shared fairly. In many city areas drinking water does not arrive regularly, and air pollution from industry and fuel hits hardest those who cannot protect themselves from it. Stewardship includes fairness.

Lokasangraha. The Bhagavad Gītā speaks of lokasangraha, acting for the wellbeing of all and rising above personal desire. It is a useful guide for how we treat Nature's gifts.

Formulas to remember
  1. Stewardship = renewables used within Nature's rate + non-renewables used judiciously + fair access for all
Whena farm stops using chemicalsThenyields may dip at first while the soil recovers, then improve
Whena country switches to solar powerThenits coal and oil last longer and pollution falls

3Worked example

A farmer earned ₹1,00,000 a year before going organic. Using Sikkim's average rise of about 20%, what might she earn once the farm recovers?
Step 120% of ₹1,00,000 = ₹20,000.
Step 2New income ≈ ₹1,00,000 + ₹20,000 = ₹1,20,000.
Step 3This is an average; some farms gain more, some less, and the first years may earn less.
More examples
  • Sikkim became a 100% organic state in 2016; incomes rose about 20%.
  • A giant solar park in Rajasthan can meet about 15% of the state's current electricity needs.
  • International Solar Alliance launched by India and France in 2015.
  • Vṛikṣhāyurveda: natural pest control, mixed cropping, careful ploughing.

4Your turn

In which year did Sikkim become a fully organic state?

5Remember this

One line to keepStewardship means using Nature's gifts so that they last and are shared fairly, learning from tradition and moving to renewables.
Common mistake. Thinking sustainable farming always lowers income; Sikkim's farmers earned more once the soil recovered.

Key Concepts

Natural resource
A material or substance that occurs in Nature and is valuable to humans.
Resource conditions
Technologically accessible, economically feasible and culturally acceptable.
Exploitation (neutral sense)
The extraction, use and consumption of natural resources.
Criterion
A shared feature used to sort things into categories.
Restoration
Returning something damaged to its original healthy state.
Regeneration
Nature's ability to create new life and the conditions for it to thrive.
Ecosystem function
A natural process such as a forest filtering water or holding soil.
Ecosystem service
A benefit humans receive from an ecosystem function, such as clean water or pollination.
Renewable resource
A resource that Nature replaces, such as sunlight, wind, flowing water and timber, if used within Nature's rate.
Non-renewable resource
A resource formed over very long periods that cannot be replaced as fast as we use it, such as coal, petroleum and metals.
Fossil fuels
Coal, petroleum and natural gas, formed from ancient living things.
Judicious use
Using a resource carefully, with good judgement and without waste.
Paradox of plenty
The situation in which resource-rich regions fail to become prosperous; also called the resource curse.
Overexploitation
Using a resource faster than it can be restored, as with Punjab's groundwater.
Green Revolution
The shift from the 1960s to high-yielding seeds, irrigation and fertilisers that raised India's grain output.
Biodiversity loss
The decline in the variety of life on Earth.
Stewardship
Responsible care of natural resources for present and future generations.
Vṛikṣhāyurveda
An ancient Indian science of plant and tree care, written down in texts such as Surapala's around the 10th century CE.
Lokasangraha
The idea in the Bhagavad Gītā of acting for the wellbeing of all.

End-of-Chapter Trial Paper & Test Questions

Topic-wise questions to test your understanding of every concept in this chapter.

  1. When does a part of Nature become a resource? / प्रकृति का कोई भाग संसाधन कब बनता है?
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    A part of Nature becomes a resource when humans use it and it is technologically accessible, economically feasible and culturally acceptable. / प्रकृति का कोई भाग तब संसाधन बनता है जब मनुष्य उसका उपयोग करें और वह तकनीकी रूप से सुलभ, आर्थिक रूप से व्यवहार्य तथा सांस्कृतिक रूप से स्वीकार्य हो।

  2. Name the three categories of natural resources based on their use, with one example each. / उपयोग के आधार पर प्राकृतिक संसाधनों की तीन श्रेणियाँ एक-एक उदाहरण सहित बताइए।
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    Resources essential for life such as drinking water, resources for materials such as marble, and resources for energy such as sunlight. / जीवन के लिए आवश्यक संसाधन जैसे पीने का पानी, सामग्री के संसाधन जैसे संगमरमर, और ऊर्जा के संसाधन जैसे सूर्य का प्रकाश।

  3. What can make a renewable resource non-renewable? / कौन-सी बात किसी नवीकरणीय संसाधन को अनवीकरणीय बना सकती है?
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    If we use it faster than Nature can restore it, as when timber is cut faster than trees regrow, the resource is depleted and is no longer renewable in practice. / यदि हम उसे प्रकृति की पुनर्स्थापना की गति से तेज़ उपयोग करें, जैसे पेड़ों के उगने से तेज़ लकड़ी काटना, तो संसाधन समाप्त होने लगता है और व्यवहार में नवीकरणीय नहीं रहता।

  4. How are non-renewable resources different from renewable ones? / अनवीकरणीय संसाधन नवीकरणीय संसाधनों से कैसे भिन्न हैं?
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    Non-renewable resources such as coal and copper take very long to form and cannot be replaced as fast as we use them, while renewable resources such as sunlight and wind are replaced by Nature. / कोयला और ताँबा जैसे अनवीकरणीय संसाधन बनने में बहुत समय लेते हैं और उपयोग की गति से उनकी भरपाई नहीं हो सकती, जबकि सूर्य का प्रकाश और पवन जैसे नवीकरणीय संसाधनों की भरपाई प्रकृति करती है।

  5. Give two ecosystem functions and the services humans get from them. / दो पारितंत्र कार्य और उनसे मनुष्यों को मिलने वाली सेवाएँ बताइए।
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    A forest filters water, so we get clean water, and tree roots hold the soil, so our farmland is protected from erosion. / वन पानी को छानता है, इसलिए हमें स्वच्छ पानी मिलता है, और पेड़ों की जड़ें मिट्टी को बाँधती हैं, इसलिए हमारी खेती की ज़मीन कटाव से बचती है।

  6. What is the 'paradox of plenty'? / 'प्रचुरता का विरोधाभास' क्या है?
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    It is the situation in which a region rich in natural resources does not become prosperous, often because it fails to build industries that turn resources into higher-value products. / यह वह स्थिति है जिसमें प्राकृतिक संसाधनों से समृद्ध क्षेत्र संपन्न नहीं बन पाता, प्रायः इसलिए कि वह संसाधनों को अधिक मूल्य वाले उत्पादों में बदलने वाले उद्योग नहीं बना पाता।

  7. Why has groundwater fallen so much in Punjab? / पंजाब में भूजल इतना नीचे क्यों चला गया है?
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    High-yielding wheat and paddy needed much more water, free electricity encouraged over-pumping, and water was drawn faster than rain could refill it, so almost 80% of the area is now over-exploited. / अधिक उपज वाले गेहूँ और धान को बहुत अधिक पानी चाहिए था, मुफ़्त बिजली ने अधिक पंपिंग को बढ़ाया और वर्षा से भरपाई से तेज़ पानी निकाला गया, इसलिए लगभग 80% क्षेत्र अब अति-दोहित है।

  8. Why can sharing river water cause tension? Give an example. / नदी के पानी का बँटवारा तनाव क्यों पैदा कर सकता है? उदाहरण दीजिए।
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    Rivers cross state and national borders, so several regions claim the same water; the Kaveri is shared by Karnataka, Tamil Nadu, Kerala and Puducherry and needed long negotiations. / नदियाँ राज्यों और देशों की सीमाएँ पार करती हैं, इसलिए कई क्षेत्र एक ही पानी पर दावा करते हैं; कावेरी कर्नाटक, तमिलनाडु, केरल और पुदुच्चेरी में बँटती है और इसके लिए लंबी बातचीत करनी पड़ी।

  9. What did Sikkim achieve in 2016 and what were the results? / सिक्किम ने 2016 में क्या उपलब्धि प्राप्त की और उसके क्या परिणाम हुए?
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    Sikkim became a fully organic state with all farmland certified; biodiversity returned, tourism grew and farmers' incomes rose by about 20% on average. / सिक्किम पूर्णतः जैविक राज्य बना जिसकी सारी कृषि भूमि प्रमाणित थी; जैव-विविधता लौटी, पर्यटन बढ़ा और किसानों की आय औसतन लगभग 20% बढ़ी।

  10. Suggest two ways in which a student can practise stewardship of natural resources. / विद्यार्थी प्राकृतिक संसाधनों के प्रति संरक्षकता कैसे निभा सकता है, दो उपाय बताइए।
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    A student can save electricity by switching off lights and fans when not needed and can save water by closing taps and reusing water for plants. / विद्यार्थी अनावश्यक बत्ती और पंखे बंद करके बिजली बचा सकता है और नल बंद रखकर तथा पानी को पौधों के लिए दोबारा उपयोग करके पानी बचा सकता है।

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