Natural Resources and Their Use : Class 8 Free Notes and Mind Map (Free PDF Download)

resource

Natural resources are the foundation of human civilization and play a crucial role in our daily lives. Understanding natural resources helps us appreciate our relationship with the environment and develop responsible practices for future generations.

Definition of Nature and Resources

Nature includes all life and non-life forms in our environment that are not created by humans. Elements of Nature become resources when humans begin to use them for their sustenance and survival. They also transform into resources when humans create new things from them for consumption purposes. For example, trees exist independently in nature, but they become resources when converted into furniture, paper, or other useful products.

Conditions for Resources

For any entity to be classified as a resource, it must satisfy three essential conditions:

  • Technologically accessible – We must have the technology and knowledge to extract or utilize it effectively
  • Economically feasible – The extraction cost must be reasonable and profitable
  • Culturally acceptable – Society must permit and accept its use without conflicts

Examples of Natural Resources

Natural resources can be categorized into obvious and less obvious examples based on their visibility and common recognition:

Obvious Natural Resources:

  • Water for drinking and daily use
  • Air for breathing and oxygen supply
  • Soil for agriculture and plant growth

Less Obvious Natural Resources:

  • Coal for energy production
  • Petroleum for fuel and industrial purposes
  • Precious stones for jewelry and decoration
  • Metal ores for manufacturing
  • Timber for construction and furniture making

Earth’s Treasures

The Earth contains numerous treasures that have been formed over millions of years through various geological processes. Humans have gradually learned to identify, extract, and utilize these treasures for their benefit and development. All materials and substances that occur naturally in our environment and provide value to human beings are classified as natural resources.

Categories of Natural Resources

Based on Uses

Resources Essential for Life

These are the most critical resources without which human life cannot exist on Earth:

  • Air – The oxygen we breathe cannot be manufactured artificially and is absolutely essential for survival
  • Water – Obtained from the atmosphere, rivers, ponds, and groundwater sources for drinking and daily activities
  • Food – Produced through soil cultivation or obtained from living organisms to provide essential nutrition

Life could not exist on Earth without these three fundamental elements, making them the most precious and irreplaceable natural resources available to humanity.

Resources for Materials

Humans have developed remarkable abilities to create various physical objects using nature’s generous gifts:

  • Wood can be transformed into chairs, tables, or carved into beautiful decorative statuettes
  • India’s geographical diversity provides abundant access to wood, marble, coal, and gold
  • These materials serve both practical utility purposes and help create objects of beauty and artistic value
  • Raw materials from nature form the foundation for countless manufactured products used in daily life

Resources for Energy

Energy serves as the cornerstone of modern living and drives all industrial development activities:

  • Used extensively for generating electricity in homes, offices, and industrial facilities
  • Powers various transportation systems including cars, trains, ships, and airplanes
  • Essential for numerous production processes in factories and manufacturing units across different industries
  • Major energy sources include coal, flowing water, petroleum, natural gas, abundant sunlight, and wind power

Based on Renewability

Nature’s Principles

Nature operates according to fundamental principles that maintain perfect balance and ensure long-term sustainability:

  • Restoration – The natural process of returning something to its original healthy state after damage or depletion
  • Regeneration – Nature’s inherent ability to create new life and favorable conditions for organisms to thrive
  • Cyclical functioning – Nature works in continuous cycles where there is absolutely no waste, and everything serves a meaningful purpose

Renewable Resources

These are resources that exhibit restoration and regeneration characteristics over reasonable periods of time:

Examples of Renewable Resources:

  • Solar energy obtained from abundant sunshine throughout the year
  • Wind energy generated from atmospheric movements and air currents
  • Flowing water energy from rivers, streams, and waterfalls
  • Timber obtained from forests that possess natural regrowth capabilities

India’s Renewable Resource Advantages:

  • Most regions across the country receive abundant sunshine throughout the year
  • Rivers are regularly fed by monsoon rains and melting glaciers from mountain ranges
  • Forests have natural regeneration capabilities and can renew themselves over time
  • Soil replenishes itself through natural biological processes and organic matter decomposition

Conditions for Renewability

For resources to remain renewable and sustainable, certain critical conditions must be carefully maintained:

  • The natural rhythm of restoration and regeneration must not be disturbed by excessive human activities
  • Harvesting rates must never exceed the natural regeneration capacity of the resource
  • If timber is harvested faster than forests can grow new trees, severe deforestation will occur
  • Scientists consistently warn that irresponsible human actions have significantly disturbed nature’s delicate natural cycles

Major Disrupting Factors:

  • Fossil fuel-driven industrialization processes that release harmful emissions
  • Cutting down forests extensively for agricultural expansion and urban development
  • Pollution from industrial waste and domestic sources contaminating natural systems

Examples of Cycle Disruption

Human activities have caused several concerning disruptions to natural cycles worldwide:

  • Rising global temperatures due to increased greenhouse gas emissions from human activities
  • Himalayan glaciers melting much faster than precipitation can effectively replace them
  • Reduced water security for large populations living in the plains and river valleys
  • Industrial waste discharge into rivers severely disturbing natural restoration cycles
  • Loss of biodiversity affecting the delicate balance of entire ecosystems

Non-renewable Resources

These are resources that were created over extremely long geological periods and cannot be replenished at the rate humans consume them:

Examples of Non-renewable Resources:

  • Fossil fuels including coal, petroleum, and natural gas
  • Various minerals and metal ores found deep underground
  • Precious metals like iron, copper, gold, and silver

India’s Non-renewable Resource Status:

  • Significant coal reserves estimated to last approximately another 50 years at current consumption rates
  • Increasing demand for electricity as population expands and development accelerates rapidly
  • Growing industrial and domestic needs accelerating the rate of resource consumption
  • Urgent need for judicious use until sustainable alternatives become widely available and affordable

Distribution of Natural Resources and Its Implications

Uneven Distribution Effects

Natural resources are not evenly distributed across the planet or within individual countries, creating several important implications:

  • Significantly shapes patterns of human settlements and population density across regions
  • Strongly influences trade relationships between different regions and countries
  • Affects international relations, diplomatic policies, and strategic partnerships
  • Many historical conflicts and modern wars have been fought to gain control over valuable natural resources

Economic Impacts

The presence or absence of natural resources significantly impacts regional economic development patterns:

Positive Economic Effects:

  • Industries established near natural resources create numerous employment opportunities for local populations
  • Townships and cities naturally grow around resource-rich areas, expanding economic opportunities
  • Modern facilities and infrastructure development improve overall quality of life for residents
  • Better access to education, healthcare, technology, and other essential services becomes available

Associated Costs and Challenges:

  • Economic benefits are often accompanied by significant costs in both short-term and long-term periods
  • Local communities are sometimes displaced from their traditional homes and ancestral lands
  • Environmental degradation can severely affect local ecosystems and biodiversity
  • Social inequality often develops between resource owners and ordinary workers

Trade and Development

The geographical location and availability of natural resources play a crucial role in trade and development:

  • National and international trade patterns depend heavily on the geographical distribution of resources
  • When combined with human knowledge, skills, and traditional techniques, resources create unique products
  • Historical example: Wootz steel production in India using local iron ore combined with traditional metallurgical techniques
  • Extensive trade relationships fueled the development of large empires throughout Indian history
  • Modern global supply chains and international commerce still depend heavily on resource distribution patterns

Transboundary Issues

Natural resources often cross political boundaries, creating complex management challenges that require cooperation:

  • Nature does not recognize or pay attention to human-made political boundaries and borders
  • This natural reality leads to tensions regarding fair sharing of resources between states and countries
  • Example: Kaveri River water sharing disputes among Karnataka, Tamil Nadu, Kerala, and Puducherry states
  • Requires careful negotiations, diplomatic discussions, and sustainable management to maintain peace
  • International cooperation and mutual understanding are essential for sustainable resource management

The ‘Natural Resource Curse’

Definition and Concept

The natural resource curse is a paradoxical economic phenomenon that challenges common assumptions about wealth and resources:

  • Having abundant natural resources does not automatically guarantee economic prosperity or development
  • Also commonly known as the “paradox of plenty” in economic literature
  • Regions rich in natural resources sometimes experience slower economic growth than resource-poor areas
  • Abundance of natural resources does not automatically translate to national wealth, prosperity, or improved living standards

Causes of the Curse

Several interconnected factors contribute to the development of the natural resource curse:

  • Economies become overly dependent on resource extraction without developing other important industries
  • Lack of sufficient investment in industries that convert raw resources into higher-value finished products
  • Limited diversification in economic activities and employment opportunities across different sectors
  • Poor governance, corruption, and mismanagement in resource extraction and revenue distribution
  • Neglect of education, skill development, and capacity building in other important sectors

India’s Approach

India has generally managed to avoid the worst effects of the natural resource curse through strategic planning:

  • Invested significantly in developing industries to convert raw resources into higher-value finished products
  • Actively promoted diversification across multiple economic sectors including manufacturing and services
  • Developed a strong service sector alongside traditional manufacturing and agriculture
  • Emphasized education, skill development, and human resource development across all sectors

Ongoing Challenges:

  • Balancing resource extraction activities with environmental sustainability and conservation
  • Ensuring equitable distribution of resource benefits across all sections of society
  • Managing significant regional disparities in resource availability and economic development
  • Human knowledge, good governance, and strategic long-term planning remain crucial for continued success

Responsible and Wise Use of Natural Resources: Stewardship

Current Challenges

Scientists and environmentalists worldwide have issued serious warnings about the consequences of irresponsible resource use:

Major Environmental Problems:

  • Widespread pollution of air, water, and soil affecting human health and ecosystem balance
  • Significant loss of biodiversity and accelerated species extinction rates across the globe
  • Climate change occurring at an unprecedented and accelerated pace in recent decades
  • Severe disruption of natural ecosystems, food chains, and ecological relationships

Restoration and Regeneration of Renewable Resources

Groundwater Depletion Issue

Groundwater depletion has emerged as a critical environmental and economic problem across India:

The Problem:

  • Many farmers extract groundwater extensively for irrigation purposes to support agricultural activities
  • Extraction rates far exceed natural replenishment rates in most states across the country
  • Water deficit builds up continuously over time, leading to higher extraction costs and deeper drilling
  • Eventually leads to complete unavailability of groundwater in many regions
  • Many growing cities are predicted to run out of accessible groundwater in the near future

Solutions Being Attempted

Various traditional and modern solutions are being implemented to address groundwater depletion:

  • Revival of traditional practices of rainwater harvesting and water conservation techniques
  • Rejuvenation of ancient ponds, tanks, and other water storage systems
  • Cutting down significantly on wasteful consumption of water in domestic and industrial uses
  • Processing, treating, and reusing wastewater for various non-drinking purposes

Soil Degradation Problem

Soil degradation has become a serious threat to agricultural productivity and food security:

  • Improper and excessive use of chemical fertilizers and pesticides causes severe soil degradation
  • Traditional farming practices considered soil as an integral part of Mother Earth deserving respect
  • Urgent need to learn from traditional sustainable practices and apply them in current situations

Traditional Solutions

Ancient agricultural practices offer sustainable solutions for soil management:

  • Use of cow dung, compost, and other natural fertilizers instead of harmful chemicals
  • Mulching techniques and multi-cropping systems that maintain soil health naturally
  • Holistic soil management practices that work in harmony with natural processes

Case Studies

Overexploitation of Groundwater: Punjab Case Study

Background

Punjab state played a crucial role in India’s agricultural transformation and food security:

  • Punjab was the home and epicenter of India’s Green Revolution during the 1960s
  • Fed a large proportion of India’s population and made the country self-sufficient in food production
  • Currently faces serious sustainability issues due to exploitation of nature beyond its regeneration capacity

The Problem Development

The transformation of Punjab’s agriculture led to unforeseen environmental consequences:

  • In the 1960s, farmers shifted from traditional varieties to high-yielding varieties of wheat and paddy
  • These new varieties required significantly more water than traditional seeds and crops
  • Farmers began extracting groundwater extensively to meet the increased water requirements
  • Free power supply provided by the government led to over-pumping of groundwater resources
  • Modern farming techniques required extensive use of chemical pesticides and fertilizers

Current Situation

The long-term consequences of intensive agriculture are now clearly visible in Punjab:

  • Groundwater level has become inaccessible until 30 meters depth in large parts of Punjab
  • Harmful chemicals from pesticides and fertilizers have dissolved in groundwater causing serious health hazards
  • Almost 80% of Punjab’s geographical area is now classified as ‘over-exploited’ in terms of groundwater
  • Food security was ensured for the short term, but serious long-term environmental consequences remain

The Case of Cement

The Challenge

Cement production presents a complex challenge balancing development needs with environmental protection:

  • Cement is absolutely required for constructing houses, schools, hospitals, bridges, roads, and airports
  • However, cement production is listed as one of the most polluting industries in the world

Environmental Impact

Cement production creates multiple environmental problems that affect human and animal health:

  • Releases fine dust particles that seriously damage the lungs of humans and animals
  • Dust settles on plant leaves, reducing photosynthesis and decreasing agricultural yields
  • Causes severe soil pollution and water contamination in surrounding areas

Solutions Being Developed

Various innovative solutions are being developed to address cement-related environmental problems:

  • Central Pollution Control Board has created strict guidelines and regulations for cement factories
  • Movement towards alternative building materials that significantly reduce pollution and environmental impact
  • Increased use of traditional materials like stone, mud, and locally available resources
  • Development of new plant-based materials and recycled materials made from waste plastic
  • Combining traditional building materials with modern technological advances for better results

Vrikshāyurveda – Ancient Indian Botanical Science

Background

Vrikshāyurveda represents India’s ancient scientific approach to plant and tree care:

  • Ancient Indian botanical science focusing specifically on comprehensive plant and tree care
  • The term derives from Sanskrit: vriksha (tree) + ayurveda (science of life and healing)
  • This traditional knowledge system dates back several millennia in Indian civilization
  • Formally documented in texts like Surapala’s Vrikshāyurveda written around the 10th century CE

Important Features

Vrikshāyurveda provides detailed scientific guidance for sustainable agriculture and forestry:

  • Elaborate recommendations on selecting specific plants suitable for different soil types and climatic conditions
  • Intricate methods for seed collection, proper preservation, and pre-planting treatments to ensure healthy growth
  • Advanced irrigation techniques that vary according to plant species, growth stage, and seasonal conditions
  • Comprehensive pest management strategies using natural repellents and companion planting techniques
  • Actively promotes crop rotation and mixed cropping systems to maintain soil health and fertility
  • Detailed advice on proper ploughing methods designed to retain moisture and support beneficial soil organisms

Sikkim’s Organic Farming Success

Pema’s Family Transformation

The story of one family illustrates Sikkim’s successful transition to organic farming:

  • Pema’s family farm faced declining yields and mounting debts from expensive chemical inputs
  • When the state government announced an ambitious policy to promote organic farming statewide
  • Initially, the transition period was difficult with dropped yields as the soil gradually recovered from chemical damage

The Process

The family’s transformation involved adopting traditional and sustainable farming practices:

  • Family completely switched to preparing their own compost using organic materials
  • Prepared natural pest repellents using locally available neem leaves and garlic
  • Started growing multiple crops throughout the year to maximize productivity and soil health
  • After five years of patient work, the farm was thriving with healthy soil and abundant crops
  • Successfully sold cardamom, ginger, and vegetables at premium prices in organic markets

Sikkim’s Achievement

Sikkim’s organic farming success has become a model for sustainable agriculture worldwide:

  • In 2016, Sikkim became the world’s first 100% organic state with all farmland officially certified
  • Local biodiversity flourished significantly with beneficial insects and birds returning to agricultural areas
  • Tourism increased substantially as visitors came specifically to see the successful organic farming model
  • Farmers’ incomes grew by an average of 20% due to premium prices for organic products
  • Sikkim now serves as a global model for sustainable agricultural practices and environmental conservation

The International Solar Alliance

Background

The International Solar Alliance represents global cooperation for renewable energy development:

  • India and France jointly launched the International Alliance for Solar Energy in 2015
  • Created as a coalition of sunshine-rich countries committed to harnessing abundant solar power
  • The alliance focuses specifically on countries blessed with abundant sunlight throughout the year

India’s Contributions

India has played a leading role in promoting solar energy globally through various initiatives:

  • Helped channel billions of dollars in investment into solar projects across developing nations
  • Shared valuable technical expertise and created affordable financing options for solar installations
  • Bhadla Solar Park in Rajasthan demonstrates India’s successful transition from traditional to renewable energy
  • This initiative represents both environmental responsibility and significant economic opportunity for participating countries

Responsible and Judicious Use of Resources

For Non-renewable Resources

The management of non-renewable resources requires careful planning and conservation strategies:

  • Need to ensure these finite resources last long enough for humanity to develop and implement sustainable alternatives
  • Must actively make the switch to renewable sources of energy for as many purposes as possible
  • Gradual transition planning is essential to avoid economic disruption while protecting the environment

Social Equity Concerns

The distribution and access to natural resources often reveals significant social inequalities:

  • Distribution and access to resources are often unfair to some sections of society, particularly marginalized communities
  • In cities, many areas do not receive adequate and regular supply of water, electricity, and other essential resources
  • Extensive use of fossil fuels disproportionately affects those who are unable to protect themselves from environmental hazards

Philosophical Perspective

A deeper understanding of our relationship with nature guides responsible resource management:

  • We must always remember our fundamental relationship with Nature and act as responsible stewards rather than exploiters
  • Work actively toward restoration, regeneration, and long-term sustainability in all our activities
  • The Bhagavad Gītā refers to lokasangraha – the concept of transcending personal desires for the wellbeing of all living beings

Questions and Answers

1. What can make what is today a renewable resource non-renewable tomorrow? Describe some actions that can prevent this from happening.

Answer:

A renewable resource can become non-renewable when:

  • Overexploitation occurs – harvesting faster than natural regeneration rate
  • Natural cycles are disrupted through pollution, climate change, habitat destruction
  • Environmental degradation makes restoration impossible

Prevention Actions:

  • Maintain sustainable extraction rates below regeneration capacity
  • Protect natural habitats and ecosystems
  • Reduce pollution and waste discharge
  • Implement traditional conservation practices
  • Use alternative materials and technologies

2. Name five ecosystem functions that serve humans.

Answer:

  • Oxygen production – trees naturally produce oxygen (275 litres per day per mature tree)
  • Water filtration – forests naturally filter water
  • Soil erosion prevention – forest cover protects farmland
  • Pollination services – beneficial insects pollinate crops
  • Habitat provision – forests provide shelter for animals supporting ecosystem balance

3. What are renewable resources? How are they different from non-renewable ones? What can people do to ensure that renewable resources continue to be available for our use and that of future generations? Give two examples.

Answer:

Renewable Resources:

  • Resources that exhibit restoration and regeneration characteristics over time
  • Can replenish themselves through natural processes
  • Examples: solar energy, wind energy, flowing water, timber

Differences from Non-renewable:

  • Non-renewable resources created over long periods, cannot replenish at usage rate
  • Examples: fossil fuels, minerals, metals
  • Renewable resources can regenerate if natural rhythm not disturbed

Actions to Ensure Availability:

  • Harvest at sustainable rates below regeneration capacity
  • Protect natural cycles and ecosystems
  • Use traditional conservation methods
  • Implement restoration projects

Two Examples:

  • Forest management through selective cutting allowing regeneration time
  • Water conservation through rainwater harvesting and groundwater recharge

4. Identify cultural practices in your home and neighbourhood that point to mindfulness in the use of natural resources.

Answer:

Traditional practices showing mindfulness:

  • Tulasi puja – reverence for plants showing respect for Nature
  • Offering arghyam to Surya – gratitude to sun-god for solar energy
  • Sacred groves – cultural protection of forest areas
  • Traditional farming – considering soil as Mother Earth
  • Seasonal fishing regulations – communities refraining from fishing during spawning season

5. What are some considerations to keep in mind in the production of goods for our current use?

Answer:

Important considerations include:

  • Sustainability – ensure production does not exceed regeneration rates
  • Pollution control – minimize environmental damage during production
  • Local employment – provide opportunities for local communities
  • Traditional knowledge integration – combine ancient wisdom with modern technology
  • Waste minimization – follow Nature’s principle of no waste
  • Climate appropriateness – design keeping local climate in mind
  • Fair distribution – ensure equitable access to resources and benefits

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