NCERT Solutions: Chapter1 Natural Resources and their Use (class 8 Social Science)
Complete, errorless chapter solutions with Hindi meanings for difficult terms. Covering Categorisation of Resources, Uneven Geographical Distribution, Mineral Mapping in India, Ecosystem Services, Sustainable Transition, and Community Conservation Practices.
Natural resources рдк्рд░ाрдХृрддिрдХ рд╕ंрд╕ाрдзрди are elements found in the environment that humans use for various purposes. They can be categorised based on their use and renewability рдирд╡ीрдХрд░рдгीрдпрддा:
1. By use:
- Essential resources рдЕрдиिрд╡ाрд░्рдп рд╕ंрд╕ाрдзрди: Air, water, and soil are crucial for life.
- Material resources рдкрджाрд░्рде рд╕ंрд╕ाрдзрди: Wood, coal, and metals are used to create products.
- Energy resources рдКрд░्рдЬा рд╕ंрд╕ाрдзрди: Solar, wind, and fossil fuels generate electricity and power industries.
2. By renewability:
- Renewable resources рдирд╡ीрдХрд░рдгीрдп рд╕ंрд╕ाрдзрди: Timber, water, and solar energy can regenerate naturally over time.
- Non-renewable resources рдЧैрд░-рдирд╡ीрдХрд░рдгीрдп рд╕ंрд╕ाрдзрди: Coal, petroleum, and minerals are finite in supply and take millions of years to form, making them difficult to replace once exhausted.
The distribution of natural resources significantly influences various aspects of human life:
- Human settlements рдоाрдирд╡ рдмрд╕्рддिрдпां: Areas rich in water, fertile soil, and minerals attract industries, leading to economic growth and dense populations.
- Trade & Commerce рд╡्рдпाрдкाрд░ рдФрд░ рд╡ाрдгिрдЬ्рдп: Regional availability shapes trade patterns, facilitating domestic and global exchange.
- Geopolitics & International relations рдЕंрддрд░рд░ाрд╖्рдЯ्рд░ीрдп рд╕ंрдмंрдз: Unequal distribution can cause diplomatic tensions or conflicts over access to vital supplies like petroleum and cross-border rivers.
- Infrastructure development: Resource-rich regions often see better transport, energy, and communication infrastructure, enhancing living standards.
- Regional Disparities рдХ्рд╖ेрдд्рд░ीрдп рдЕрд╕рдоाрдирддाрдПं: Unequal distribution creates varying levels of prosperity between mineral-rich and resource-poor areas.
Unsustainable use рдЕрд╕्рдеिрд░ / рдЕрдиिрдпंрдд्рд░िрдд рдЙрдкрдпोрдЧ or over-exploitation of natural resources leads to serious long-term consequences:
- Resource depletion рд╕ंрд╕ाрдзрдиों рдХा рдХ्рд╖рд░рдг: Overuse exhausts non-renewable reserves, leaving fewer options for future generations.
- Ecosystem damage рдкाрд░िрд╕्рдеिрддिрдХी рддंрдд्рд░ рдХो рдХ्рд╖рддि: Destruction of natural habitats leads to loss of biodiversity and destabilizes biological food chains.
- Acute Shortages: Excessive extraction of replenishable resources, like groundwater and topsoil, exceeds their natural replenishment rate.
- Livelihood crises: Local communities depending on forests, fisheries, and fertile land face economic marginalization.
- Global environmental crises: Over-exploitation accelerates climate change, air/water pollution, desertification, and resource-driven conflicts.
Everything around us, from our clothing to complex electronic devices, originates directly or indirectly from nature:
- Plastic button on a shirt: Derived from synthetic polymers produced using petrochemicals (crude oil and natural gas) extracted from the Earth's crust.
- Fabrics & Garments: Cotton, linen, and jute come from cultivated plants; wool and silk come from animals.
- Buildings & Infrastructure: Constructed from timber (forests), bricks (clay/soil), cement (limestone), and steel (iron ore).
- Energy & Power: Electricity powering our homes is generated from coal, natural gas, running water, wind, or sunlight.
Natural resources can be classified through multiple scientific and geographical criteria:
- 1. Biotic and Abiotic (Origin) рдЙрдд्рдкрдд्рддि рдХे рдЖрдзाрд░ рдкрд░: Derived from living organisms (plants, animals, forests) vs. non-living elements (air, water, minerals, soil).
- 2. Renewable and Non-renewable (Exhaustibility) рд╕рдоाрдк्рдпрддा рдХे рдЖрдзाрд░ рдкрд░: Can replenish within a human timescale (sunlight, wind, water) vs. finite reserves requiring millions of years to form (coal, petroleum).
- 3. Geographical Distribution (Ubiquitous vs. Localised) рд╡िрддрд░рдг рдХे рдЖрдзाрд░ рдкрд░: Present everywhere (sunlight, air) vs. found only in specific geological locations (coal seams, petroleum fields, copper deposits).
- 4. Accessibility & Development: Readily accessible surface resources vs. deep oceanic oil beds requiring specialized extraction technology.
- 5. Cultural & Spiritual Significance: Elements revered by indigenous traditions, such as sacred rivers, groves, and mountains.
Across India and globally, deep-rooted cultural traditions honour nature as sacred:
- Sacred Groves рдкрд╡िрдд्рд░ рдЙрдкрд╡рди / рджेрд╡рд░ाрдИ: Community-protected pristine forest patches (e.g., Devarakadu in Karnataka, Sarnas in Jharkhand, Orans in Rajasthan) where hunting and tree-felling are strictly prohibited.
- River Veneration: Major life-giving rivers like the Ganga, Yamuna, Narmada, and Kaveri are revered and protected as mother deities.
- Tree Conservation: Species like Peepal, Banyan, Tulsi, and Neem are revered in domestic daily rituals, preventing them from being casually cut down.
- Indigenous Traditions Worldwide: Native communities follow principles of never taking more from nature than what is needed for immediate subsistence.
Traditional community-managed practices that foster ecological equilibrium include:
- Traditional Rainwater Harvesting рдкाрд░ंрдкрд░िрдХ рдЬрд▓ рд╕ंрдЪрдпрди: Structures such as Johads (Rajasthan), Bawris/Stepwells (Gujarat), and Kuls (Himachal Pradesh) recharge local water tables naturally.
- Crop Rotation and Polyculture рдлрд╕рд▓ рдЪрдХ्рд░ рдк्рд░рдгाрд▓ी: Intercropping legumes with cereals maintains soil nitrogen naturally without synthetic chemicals.
- Seasonal Taboos on Harvesting: Many fishing communities avoid marine fishing during monsoon breeding seasons, ensuring fish populations regenerate.
- Rotational Pastoral Grazing рдЪрдХ्рд░ीрдп рдЪрд░ाрдИ: Nomadic pastoralists move herds across seasons, preventing overgrazing in sensitive grassland ecosystems.
Human Actions Disrupting Nature's Cycle:
- Deforestation рд╡рдиों рдХी рдХрдЯाрдИ: Clearing forests for construction and farming faster than trees can regrow.
- Over-extraction of Groundwater рднूрдЬрд▓ рдХा рдЕрддि-рджोрд╣рди: Tube wells drawing subterranean water faster than rainfall can recharge aquifers.
- Soil Degradation: Excessive application of chemical fertilizers and pesticides killing beneficial soil microbes.
- Water Pollution: Direct discharge of untreated domestic sewage and industrial effluents into water bodies.
Corrective Interventions to Restore Balance:
- Afforestation рд╡рдиीрдХрд░рдг: Planting diverse native trees to restore green cover and local biodiversity.
- Rainwater Harvesting: Mandatory recharge pits and rooftop harvesting to revive declining water tables.
- Organic Farming: Shifting to bio-fertilizers, composting, and vermiculture to restore natural soil ecology.
- Sewage Treatment Plants (STPs): Treating all wastewater prior to environmental discharge.
Sample Regional Study (Urban / Semi-Urban Region):
- Available Renewable Resources: Solar radiation, municipal biomass/waste, and surface water bodies (canals/rivers).
- Observed Status Changes Over Time:
• Solar Energy: Substantial increase due to government subsidies for rooftop photovoltaic systems.
• Water Bodies: Severe volumetric depletion and chemical pollution due to urban expansion.
• Biomass: Largely underutilized; open burning of crop residue creates air quality hazards. - Reasons for Changes: Rapid unplanned urbanization, population pressure, and lagging waste segregation infrastructure.
- Recommended Remedial Actions: Implementing mandatory solar net-metering on all public buildings, setting up modern waste-to-energy biomethanation facilities, and strictly protecting catchment wetlands from land encroachment.
| Non-Renewable Resource (Daily Use) | Current Daily Uses | Possible Renewable Substitutes | Actionable Steps for Transition |
|---|---|---|---|
| Coal рдХोрдпрд▓ा | Thermal power generation for electricity, cement & steel industries. | Solar PV parks, wind turbines, hydro & green hydrogen. | Adopt solar rooftop units, switch to LED fixtures, upgrade to energy-efficient 5-star appliances. |
| Petroleum (Petrol / Diesel) рдкेрдЯ्рд░ोрд▓िрдпрдо | Automobile transport, domestic cooking LPG, plastics manufacturing. | Electric vehicles (EVs), compressed biogas (CBG), biofuels (ethanol blending). | Expand electric bus fleets, incentivize EV two-wheelers, promote carpooling and metro rail transit. |
| Natural Gas (PNG / CNG) рдк्рд░ाрдХृрддिрдХ рдЧैрд╕ | Household kitchen cooking gas, industrial heating. | Biogas (from agricultural/cattle waste), solar induction cooking. | Set up community biomethanation plants; replace gas stoves with solar-powered induction units. |
| Metals (Iron, Copper, Aluminium) рдзाрддु рдЦрдиिрдЬ | Wiring, structural building frames, electronic appliances, cutlery. | Recycled secondary metals, structural timber, engineered bamboo composites. | Implement circular e-waste recycling; separate scrap metals from general municipal waste. |
The geological map reveals that mineral reserves in India are geographically concentrated in distinct zones:
- Coal: Concentrated primarily in the Gondwana coalfields of eastern and central India (Jharia, Bokaro, Raniganj, Korba, Talcher) and tertiary lignite in south India (Neyveli, Singareni).
- Iron Ore рд▓ौрд╣ рдЕрдпрд╕्рдХ: Abundant in the peninsular plateau — Odisha-Jharkhand belt (Bailadila, Mayurbhanj, Keonjhar, Gua) and Karnataka-Goa belt (Ballari, Kudremukh, Ratnagiri).
- Bauxite (Aluminium Ore) рдмॉрдХ्рд╕ाрдЗрдЯ: Primarily located in the plateau regions of Amarkantak, Katni, Bilaspur, and Koraput (Odisha).
- Petroleum / Natural Gas: Found along the western offshore shelf (Mumbai High, Bassein), Gujarat coastal plains (Ankleshwar, Kalol), and the Brahmaputra valley in Assam (Digboi, Naharkatia, Moran).
| Natural Resource | Major Producing States in India | Connected Primary Economic Activities |
|---|---|---|
| Coal | Jharkhand, Odisha, Chhattisgarh, West Bengal, Madhya Pradesh, Telangana. | Open-cast and underground coal mining, coal washeries, thermal electricity generation, locomotive and metallurgical fuel. |
| Iron Ore | Odisha, Chhattisgarh, Karnataka, Jharkhand, Goa. | Opencast mechanized iron ore mining, beneficiation plants, integrated blast-furnace steel mills, heavy machinery fabrication. |
Key Observations on Distribution & Economy:
- Both coal and iron ore co-exist in close geographical proximity across the Chota Nagpur Plateau region.
- This colocation gave rise to the Heavy Industrial Belt of Eastern India (Jamshedpur, Rourkela, Bokaro, Durgapur, Bhilai), generating employment in mining, heavy transport logistics, and steel manufacturing.
Adverse Implications of Uncontrolled Extraction рд╕ंрд╕ाрдзрди рдиिрд╖्рдХрд░्рд╖рдг рдХे рджुрд╖्рдкрд░िрдгाрдо:
- Displacement & Social Inequity: Mining operations often displace indigenous forest communities and alter ancestral habitats.
- Environmental Degradation: Land scarring, acid mine drainage, water table toxicity, and massive air pollution from coal and metal dust.
- Intergenerational Injustice рдЕंрддрд░-рдкीрдв़ीрдЧрдд рдЕрди्рдпाрдп: Leaving depleted, degraded ecosystems and exhausted mineral reserves for upcoming generations.
Ways to Use Nature's Gifts Responsibly:
- Circular Economy Model рдЪрдХ्рд░ीрдп рдЕрд░्рдерд╡्рдпрд╡рд╕्рдеा: Mandate the 3Rs — Reduce, Reuse, and Recycle — for all metals, plastics, and paper.
- Mandatory Mine Reclamation рдЦрджाрди рдкुрдирд░ुрдж्рдзाрд░: Enforce backfilling of open-cast mines and restorative reforestation after mineral exhaustion.
- Transition to Renewable Substitutes: Replace fossil fuels with solar, wind, and biomass energy to reduce carbon emissions.
- The Disputing Nations: Ethiopia (upstream) vs. Egypt and Sudan (downstream).
- Cause of Conflict: Ethiopia constructed the massive 5-billion-dollar Grand Ethiopian Renaissance Dam on the Blue Nile to generate electricity and eradicate domestic energy poverty.
- Downstream Concerns: Egypt relies on the Nile River for over 90% of its freshwater supply for drinking and agricultural irrigation. Egypt fears that filling the mega-reservoir will reduce downstream water volume, causing water shortages and crop failures.
- Significance: This dispute illustrates how cross-border shared natural resources, such as international river basins, create geopolitical friction unless regulated by comprehensive multilateral water-sharing treaties.
Mere availability of natural resources does not lead to economic prosperity. The following critical human and technological inputs are required to transform raw nature into usable assets:
- 1. Skilled Human Capital рдХुрд╢рд▓ рдоाрдирд╡ рдкूंрдЬी: Engineers, geologists, scientists, and technicians trained in sustainable extraction and refining.
- 2. Capital Investment & Finance рдкूंрдЬी рдиिрд╡ेрд╢: Substantial monetary resources to fund exploration machinery, processing mills, and research.
- 3. Modern Technology: Advanced machinery and green processing techniques that extract minerals with minimal ecological disturbance.
- 4. Robust Infrastructure рдордЬрдмूрдд рдмुрдиिрдпाрджी рдвांрдЪा: Heavy-haul freight railways, highways, ports, power grids, and water supply networks connecting remote mines to consumer markets.
- 5. Transparent Governance & Policy: Anti-corruption mining regulations, fair royalty distribution, and enforcement of safety standards.
- 6. Environmental & Social Safeguards: Strict environmental impact assessments (EIA) to safeguard local communities and biodiversity.
A renewable resource becomes non-renewable when human consumption outpaces its natural biological or hydrological replenishment rate:
- Over-extraction of Groundwater: Withdrawing deep subterranean water reserves faster than rainfall infiltration turns renewable aquifers into dry, depleted beds.
- Deforestation: Clear-cutting forests prevents natural sapling regeneration, leading to permanent soil erosion and desertification.
- Overfishing: Catching fish faster than their reproduction cycle decimates breeding stocks, collapsing marine food chains.
Preventive Measures:
- Set statutory limits on groundwater pumping; mandate nationwide rooftop rainwater harvesting.
- Implement selective timber harvesting coupled with compensatory afforestation.
- Enforce seasonal moratoriums on marine trawling during fish breeding seasons.
Natural ecosystems provide essential ecological services рдкाрд░िрд╕्рдеिрддिрдХीрдп рд╕ेрд╡ाрдПं that sustain human life:
- Oxygen Production & Carbon Sequestration рдХाрд░्рдмрди рдкृрдердХ्рдХрд░рдг: Photosynthesis by terrestrial forests and marine phytoplankton generates breathable atmospheric oxygen while absorbing greenhouse gases.
- Natural Crop Pollination рдлрд╕рд▓ рдкрд░ाрдЧрдг: Bees, butterflies, moths, and birds pollinate over 75% of global food crops, underpinning agricultural productivity.
- Water Purification & Filtration: Wetlands, riverbanks, and forested catchments filter out silt, toxic heavy metals, and organic pollutants from surface runoff.
- Soil Genesis & Nutrient Cycling рдоृрджा рдиिрд░्рдоाрдг рдФрд░ рдкोрд╖рдХ рдЪрдХ्рд░: Bacterial decomposition of dead matter continuously recycles nitrogen, phosphorus, and organic carbon into topsoil.
- Climate Moderation & Disaster Mitigation: Coastal mangrove forests and coral reefs absorb storm surges and tsunami waves, buffering vulnerable human shorelines.
Renewable resources are natural resources that replenish or cycle naturally through physical, biological, or chemical processes within a human timescale (e.g., solar radiation, wind, water, timber).
Difference from Non-Renewable Resources:
- Renewable: Inexhaustible under responsible management; ecologically clean.
- Non-renewable: Finite geological reserves (coal, petroleum, metallic ores) formed over millions of years that cannot be renewed once consumed.
Two Practical Action Examples to Ensure Continuous Availability:
- Example 1 (Water Conservation): Installing community rainwater harvesting systems to replenish groundwater reserves before they are depleted by tube wells.
- Example 2 (Sustainable Forestry): Enforcing replanting protocols where two saplings are planted and nurtured for every single commercial timber tree harvested.
Mindful cultural traditions practiced across Indian homes and neighborhoods include:
- Use of Biodegradable Serving Materials: Utilizing fresh banana leaves, sal tree leaf plates (pattals), and unglazed clay cups (kulhads) during weddings, religious feasts, and social gatherings instead of single-use plastics.
- Clay Idol Immersion (Eco-Friendly Festivals): Crafting festive idols (Ganesh Chaturthi, Durga Puja) from unbaked, natural river clay painted with vegetable dyes rather than non-biodegradable Plaster of Paris (PoP).
- Sacred Protection of Flora: Daily watering and tending of the sacred Tulsi plant, Peepal, and Banyan trees, promoting botanical preservation.
- Household Upcycling: Repurposing old cotton clothes into kitchen dusters, shopping bags, and floor mats (dhurries) rather than discarding them as solid waste.
- Water Veneration Rituals: Periodic cleaning and protection of village ponds, stepwells, and natural springs during religious observances.
To prevent rapid planetary degradation, contemporary manufacturing must incorporate the following sustainable industrial principles:
- 1. Eco-friendly Raw Materials: Use recycled secondary metals, organic non-toxic dyes, and biodegradable packaging instead of virgin non-renewable resources.
- 2. High Energy Efficiency: Transition production lines to captive rooftop solar power, co-generation steam units, and high-efficiency electric motors to reduce the product's carbon footprint.
- 3. Zero Waste & Closed Loops рд╢ूрди्рдп рдЕрдкрд╢िрд╖्рдЯ рдЪрдХ्рд░: Design products for disassembly, reuse, and remanufacture so that components re-enter industrial supply streams at the end of their life cycle.
- 4. Product Durability & Repairability: Engineer durable goods that can be repaired, upgraded, and maintained easily, discouraging the "throwaway culture".
- 5. Ethical Sourcing & Fair Trade: Ensure supply chains source minerals and raw inputs responsibly without forced labor, child exploitation, or illegal deforestation.