Chapter 16: Management of Natural Resources
NCERT Class 10 Science Exercise Solutions
How to Use This Exercise Widget
Each question block contains a "Show Answer" button. Click it to reveal the detailed answer. Only one answer is shown at a time — opening a new answer will hide the previous one. These solutions cover sustainable development, conservation, water management, forests, wildlife, and community participation.
What changes would you suggest in your home in order to be environment-friendly?
Here are practical, implementable suggestions for making homes more environment-friendly:
| Area | Specific Changes | Environmental Benefit |
|---|---|---|
| Energy Conservation | • Use LED bulbs instead of incandescent • Install solar water heater • Use energy-efficient appliances (5-star rated) • Switch off lights/fans when not in use • Use natural light during day |
Reduces electricity consumption, lowers carbon footprint |
| Water Management | • Fix leaking taps immediately • Use low-flow showerheads • Collect rainwater for gardening • Reuse kitchen water for plants • Install dual-flush toilets |
Conserves precious freshwater resources |
| Waste Reduction | • Practice composting kitchen waste • Segregate waste (wet/dry/recyclable) • Avoid single-use plastics • Use cloth bags for shopping • Donate usable items instead of discarding |
Reduces landfill burden, promotes recycling |
| Food Practices | • Grow kitchen herbs/vegetables • Avoid food wastage • Buy local and seasonal produce • Reduce meat consumption • Use leftovers creatively |
Reduces food miles, packaging waste, methane emissions |
| Chemical Usage | • Use natural cleaners (vinegar, baking soda) • Avoid chemical pesticides in garden • Use eco-friendly detergents • Proper disposal of hazardous waste (batteries, medicines) |
Prevents water pollution, protects soil health |
| Transportation | • Walk/cycle for short distances • Use public transport when possible • Carpool for work/school • Maintain vehicle for optimal fuel efficiency |
Reduces air pollution and fossil fuel consumption |
Additional Suggestions:
1. Home Design:
• Plant trees for shade and oxygen
• Use sustainable building materials
• Install proper insulation to reduce heating/cooling needs
2. Consumer Choices:
• Buy products with minimal packaging
• Choose durable goods over disposable ones
• Support eco-friendly brands
• Repair instead of replace when possible
3. Behavioral Changes:
• Educate family members about eco-friendly practices
• Celebrate festivals without firecrackers
• Reduce paper usage (go digital)
• Participate in local clean-up drives
Impact Measurement:
• A single LED bulb saves 400 kg CO₂ over its lifetime
• Fixing a dripping tap saves 20,000 liters/year
• Composting reduces 30% household waste
• Carpooling reduces emissions by 50% per person
Remember: Small changes in every home collectively create massive environmental benefits. Start with 2-3 changes and gradually incorporate more.
Can you suggest some changes in your school which would make it environment-friendly?
Schools can become environment-friendly through these changes, many of which are student-driven:
| Area | Specific Changes | Student Involvement |
|---|---|---|
| Energy Conservation | • Install solar panels on rooftops • Use motion-sensor lights in corridors • Optimize AC temperature (24°C) • Paint roofs white to reflect heat • Conduct energy audits |
Energy monitors to switch off unused lights/fans |
| Water Management | • Install rainwater harvesting system • Reuse treated wastewater for gardening • Fix leaks promptly • Use water-efficient fixtures • Create water conservation awareness |
Water brigade to check for leaks, promote conservation |
| Waste Management | • Segregation bins in every classroom • Compost organic waste from canteen • Paper recycling program • E-waste collection drives • Zero-waste events |
Green club manages waste, creates awareness |
| Green Campus | • Plant native trees and create gardens • Maintain herbal garden with medicinal plants • Create butterfly gardens • Install bird feeders and water baths • Develop outdoor classrooms |
Gardening club plants and maintains green areas |
| Curriculum Integration | • Include environmental education in all subjects • Practical projects on conservation • Field trips to eco-friendly sites • Guest lectures by environmentalists • Environmental science as compulsory subject |
Students lead eco-projects, presentations |
| Transportation | • Promote cycling/walking to school • School bus system with optimized routes • Car-free day once a month • Bicycle parking facilities • Electric vehicle charging stations |
Cycle clubs, walk-to-school campaigns |
Specific Student-Led Initiatives:
1. Eco-Club Activities:
• "Each One Plant One" tree plantation drive
• "No Plastic Day" every week
• Poster competitions on environmental themes
• Environmental quiz and debates
• Documentary screenings on conservation
2. Resource Conservation:
• Both sides of paper usage
• Digital assignments and notes
• Book exchange program
• Reusable water bottles instead of disposable
• Cloth napkins instead of paper tissues
3. Infrastructure Changes:
• Green buildings with natural ventilation
• Solar-powered calculators and devices
• Vertical gardens on walls
• Permeable pavements for groundwater recharge
• Solar street lights in campus
4. Behavioral Changes:
• Turn off projectors and computers after use
• Use stairs instead of elevators
• Share textbooks among siblings
• Bring waste-free lunches
• Participate in clean-up drives
5. Monitoring and Recognition:
• "Green Classroom" competition with monthly awards
• Display energy/water savings on noticeboards
• Environmental credits for students
• Include eco-activities in report cards
Success Stories from Indian Schools:
• Delhi: Schools with rainwater harvesting save 2 million liters annually
• Bangalore: Some schools generate 40% energy from solar
• Ahmedabad: School composts 100 kg waste daily, uses it in gardens
• Chennai: Schools with paper recycling save 5,000 trees yearly
Remember: Schools are not just buildings but learning laboratories for sustainable living. Environment-friendly schools produce environmentally conscious citizens.
We saw in this chapter that there are four main stakeholders when it comes to forests and wildlife. Which among these should have the authority to decide the management of forest produce? Why do you think so?
The Four Main Stakeholders:
1. Local People living in and around forests
2. Forest Department of the Government
3. Industrialists who use forest produce
4. Wildlife and Nature Enthusiasts
Who Should Have Authority?
The Local People should have primary authority, but in collaboration with all stakeholders through participatory management.
Why Local People Should Have Primary Authority:
| Reason | Explanation | Example/Evidence |
|---|---|---|
| Traditional Knowledge | Generations of experience in sustainable resource use | Bishnoi community in Rajasthan protecting trees for centuries |
| Direct Dependence | Their survival depends on forests for food, fuel, medicine, livelihood | Tribals collect 80% of their needs from forests |
| Sustainable Practices | Indigenous conservation methods proven over time | Sacred groves protected by local communities across India |
| Long-term Perspective | They think intergenerationally, unlike industrial short-term profit | Chipko movement showed commitment to future generations |
| Effective Protection | Better at preventing illegal activities than distant officials | Joint Forest Management shows 30% better protection with community involvement |
Role of Other Stakeholders:
1. Forest Department:
• Role: Technical expertise, legal framework, monitoring
• Limitation: Often bureaucratic, disconnected from ground reality
• Example: Successful in protected areas but failed in community forests
2. Industrialists:
• Role: Economic development, employment generation
• Limitation: Profit-motivated, often over-exploit resources
• Example: Paper mills caused deforestation in many regions
3. Wildlife Enthusiasts:
• Role: Conservation advocacy, biodiversity protection
• Limitation: May prioritize wildlife over human needs
• Example: Sometimes oppose necessary forest use by locals
Successful Model: Participatory Forest Management
↓
Sustainable Forest Management
1. Joint Forest Management (JFM) in India:
• Communities protect forests, get usufruct rights
• 22% of India's forests under JFM
• Regenerated millions of hectares of degraded forests
2. Van Panchayats in Uttarakhand:
• Village forest councils managing forests since 1931
• More effective than government management
• Balanced use and conservation
3. International Examples:
• Nepal: Community forestry revived 1.2 million hectares
• Mexico: Ejidos (community forests) manage 60% of forests
• Scandinavia: Sami people manage reindeer herds sustainably
Constitutional and Legal Support in India:
• Forest Rights Act 2006 recognizes tribal rights
• Panchayats (Extension to Scheduled Areas) Act 1996
• Biological Diversity Act 2002 emphasizes community participation
Why Not Exclusive Authority to Any One Group?
• Local people alone: May lack technical knowledge for certain aspects
• Government alone: Top-down approach often fails
• Industry alone: Would lead to over-exploitation
• Conservationists alone: May ignore human needs
Conclusion: While local people should have primary authority, a collaborative approach involving all stakeholders in a balanced way ensures both conservation and sustainable use. This democratic, participatory model aligns with sustainable development goals.
How can you as an individual contribute or make a difference to the management of (a) forests and wildlife, (b) water resources and (c) coal and petroleum?
As individuals, we can make significant contributions through conscious choices and actions:
(a) Management of Forests and Wildlife:
| Action Area | Specific Contributions | Impact |
|---|---|---|
| Conscious Consumption | • Reduce paper usage (go digital) • Use both sides of paper • Avoid products from endangered species • Choose FSC-certified wood products • Reduce meat consumption (reduces deforestation for grazing) |
Reduces demand for forest products, protects habitats |
| Direct Conservation | • Plant native trees on birthdays/special occasions • Participate in tree plantation drives • Create bird feeders and water baths • Maintain a small garden with native plants • Volunteer with wildlife conservation organizations |
Increases green cover, supports local biodiversity |
| Education & Awareness | • Learn about local flora and fauna • Educate others about importance of forests • Organize nature walks and bird-watching • Support environmental education in schools • Use social media to spread conservation messages |
Creates informed citizens who value nature |
| Responsible Tourism | • Follow rules in national parks/wildlife sanctuaries • Don't litter in natural areas • Don't feed or disturb wild animals • Choose eco-friendly resorts • Respect local communities near forests |
Minimizes human impact on sensitive ecosystems |
| Policy Support | • Vote for environment-conscious leaders • Support conservation policies • Report illegal activities (poaching, logging) • Participate in public hearings on forest issues • Join citizen science projects monitoring wildlife |
Strengthens legal protection for forests and wildlife |
(b) Management of Water Resources:
| Action Area | Specific Contributions | Impact |
|---|---|---|
| Domestic Conservation | • Fix leaking taps immediately (saves 20L/day) • Take shorter showers (5 minutes max) • Use bucket instead of shower • Turn off tap while brushing/washing hands • Collect RO wastewater for plants/cleaning |
Direct water saving: 50-100 liters per person daily |
| Efficient Usage | • Use washing machine with full load only • Water plants in early morning/late evening • Use drip irrigation for gardens • Install water-efficient fixtures • Reuse kitchen water for plants |
Optimizes water use, reduces wastage |
| Rainwater Harvesting | • Install rooftop rainwater harvesting at home • Use rain barrels to collect rainwater • Create recharge pits in gardens • Promote RWH in neighborhood • Support community rainwater projects |
Recharges groundwater, provides alternative source |
| Pollution Prevention | • Don't pour oils/chemicals down drains • Use biodegradable detergents • Proper disposal of medicines/chemicals • Participate in river/lake clean-up drives • Reduce plastic use (prevents water pollution) |
Protects water quality, reduces treatment costs |
| Awareness & Advocacy | • Educate about water footprint of products • Support water conservation policies • Report water theft/pollution • Celebrate important days (World Water Day) • Practice and promote traditional water wisdom |
Creates water-conscious society |
(c) Management of Coal and Petroleum:
| Action Area | Specific Contributions | Impact |
|---|---|---|
| Energy Conservation | • Use public transport, cycle, or walk • Carpool for work/school • Maintain vehicles for optimal mileage • Switch off lights/appliances when not in use • Use energy-efficient appliances (5-star rated) |
Reduces fossil fuel consumption significantly |
| Alternative Energy | • Install solar water heater at home • Use solar lanterns/chargers • Support renewable energy policies • Invest in community solar projects • Choose green energy options if available |
Reduces dependence on fossil fuels |
| Conscious Consumption | • Reduce use of plastics (made from petroleum) • Choose products with less packaging • Repair instead of replace when possible • Buy local products (reduces transport fuel) • Reduce air travel when alternatives exist |
Lowers demand for petroleum products |
| Waste Reduction | • Practice 3Rs (Reduce, Reuse, Recycle) • Compost organic waste • Donate usable items • Avoid single-use plastics • Choose durable products over disposable |
Reduces energy needed for production and disposal |
| Education & Advocacy | • Learn about climate change impacts • Educate others about fossil fuel depletion • Support carbon tax/emission regulations • Participate in Earth Hour and similar events • Advocate for sustainable energy policies |
Creates pressure for transition to renewables |
Quantifying Individual Impact:
• Water: One person can save 30,000 liters/year through simple measures
• Energy: Using LED bulbs saves 400 kg CO₂ per bulb lifetime
• Forests: One tree planted absorbs 20 kg CO₂/year
• Petroleum: Carpooling saves 500 liters fuel/person/year
Multiplier Effect:
When individuals act, they influence families, friends, and communities. If 10% of Indians save 10 liters water daily, that's 1.3 billion liters daily!
Remember: Management of natural resources begins with individual responsibility. Small actions, multiplied by millions of people, create massive positive change.
What can you as an individual do to reduce your consumption of the various natural resources?
Reducing consumption of natural resources requires mindful daily choices. Here's a comprehensive guide:
1. Follow the 5Rs (Refuse, Reduce, Reuse, Repurpose, Recycle):
| Natural Resource | Reduction Strategies | Estimated Saving |
|---|---|---|
| Water | • Fix leaks immediately • Take 5-minute showers • Use bucket for bathing • Collect RO wastewater • Water plants with reused water |
50-100 liters/person/day |
| Energy (Electricity) | • Use LED bulbs (saves 80% energy) • Switch off appliances at plug point • Optimize AC use (24°C, regular servicing) • Use natural light and ventilation • Unplug chargers when not in use |
30-40% household electricity |
| Forest Products | • Use both sides of paper • Go digital (e-bills, e-tickets) • Use cloth bags (not paper) • Borrow/share books • Choose recycled paper products |
Saves 1 tree per person every 2 years |
| Petroleum Products | • Walk/cycle for short distances • Use public transport • Carpool regularly • Maintain vehicle properly • Plan trips efficiently |
500 liters fuel/person/year |
| Minerals & Metals | • Repair electronics instead of replacing • Recycle old devices properly • Choose durable products • Avoid disposable batteries (use rechargeable) • Donate old jewelry/metals |
Reduces mining pressure significantly |
| Food Resources | • Avoid food wastage • Eat local and seasonal • Reduce meat consumption • Compost kitchen waste • Grow some vegetables at home |
30% reduction in food footprint |
2. Conscious Purchasing Decisions:
Before Buying Anything, Ask:
2. Can I borrow/share instead?
3. Can I buy it second-hand?
4. Is it durable and repairable?
5. Is it made sustainably?
6. Is packaging minimal/recyclable?
3. Home and Lifestyle Changes:
Kitchen:
• Use pressure cooker (saves 50% fuel)
• Cook with lid on vessels
• Soak dal/rice before cooking
• Use solar cooker when possible
• Store food properly to prevent spoilage
Bathroom:
• Install low-flow showerheads
• Use mug instead of shower
• Turn off tap while brushing (saves 6 liters/minute)
• Fix dripping taps (wastes 20 liters/day)
• Use biodegradable soaps/detergents
Living Area:
• Use curtains/blinds to regulate temperature
• Plant trees for natural cooling
• Use ceiling fans instead of AC when possible
• Switch to renewable energy if available
• Use smart power strips
4. Transportation Choices (Hierarchy):
5. Digital Responsibility:
• Clean up email inbox (data centers consume huge energy)
• Stream videos in lower resolution when HD not needed
• Turn off auto-play on social media
• Use cloud storage efficiently
• Extend lifespan of electronic devices
6. Community Participation:
• Join local environmental groups
• Participate in clean-up drives
• Support community gardens
• Advocate for better public transport
• Share resources within neighborhood
7. Track Your Progress:
• Monitor electricity/water bills monthly
• Calculate your carbon footprint annually
• Set reduction targets (e.g., "reduce electricity by 10% this year")
• Celebrate milestones
Quantifying the Impact:
If an average Indian household (4 people) implements these measures:
• Water: Saves 150,000 liters/year (worth ₹3000)
• Electricity: Saves 1000 units/year (worth ₹8000)
• Fuel: Saves 800 liters/year (worth ₹80,000 if carpooling)
• Waste: Reduces by 50% (500 kg less to landfill)
• Carbon: Reduces footprint by 3 tons CO₂/year
Psychological Benefits:
• Sense of purpose and contribution
• Financial savings
• Healthier lifestyle (walking/cycling)
• Connection with nature
• Setting positive example for others
Remember: Resource conservation isn't about deprivation but about intelligent, mindful consumption. Every small action counts, and consistency matters more than perfection.
List five things you have done over the last week to (a) conserve our natural resources (b) increase the pressure on our natural resources.
This answer provides a template for self-reflection. Here are examples based on typical student activities:
(a) Five things done to CONSERVE natural resources:
| Activity | Resource Conserved | Impact |
|---|---|---|
| 1. Used both sides of paper for notes | Forests/Paper | Saved 20 sheets of paper ≈ 0.02 trees |
| 2. Took 5-minute showers instead of 15-minute | Water | Saved 150 liters (10 liters/minute × 10 minutes) |
| 3. Walked to nearby market instead of taking auto | Petroleum | Saved 0.5 liters petrol ≈ 1.2 kg CO₂ emissions |
| 4. Switched off lights/fans when leaving room | Energy (Coal) | Saved 5 kWh electricity ≈ 5 kg coal burning avoided |
| 5. Carried cloth bag for shopping | Petroleum (Plastics) | Avoided 5 plastic bags ≈ 0.1 liters petroleum saved |
Weekly Conservation Impact:
• Water: 150 liters × 7 = 1,050 liters saved
• Energy: 5 kWh × 7 = 35 kWh saved (powers 2 LED bulbs for month)
• Fuel: 0.5 liters × 3 trips = 1.5 liters saved
• Trees: 0.02 trees × 7 = 0.14 trees equivalent
• Carbon: Approximately 10 kg CO₂ reduced
(b) Five things done that INCREASED pressure on natural resources:
| Activity | Resource Pressured | Impact |
|---|---|---|
| 1. Left charger plugged in overnight | Energy (Phantom load) | Wasted 0.1 kWh daily ≈ 7 kg coal burned unnecessarily |
| 2. Used disposable paper plates at party | Forests | Used 20 paper plates ≈ 0.01 trees cut |
| 3. Left tap running while brushing teeth | Water | Wasted 30 liters daily (6 liters/minute × 5 minutes) |
| 4. Threw away leftover food | Agricultural resources | Wasted 500g food ≈ 750 liters virtual water wasted |
| 5. Used AC at 18°C instead of 24°C | Energy | Extra 1 kWh/hour ≈ 1 kg extra coal burned per hour |
Weekly Pressure Impact:
• Water: 30 liters × 14 brushings = 420 liters wasted
• Energy: 1 kWh AC × 10 hours + 0.7 kWh phantom = 10.7 kWh extra
• Forests: 0.01 trees equivalent for paper plates
• Food: 500g × 2 times = 1kg food wasted (1500L virtual water)
• Carbon: Approximately 15 kg CO₂ extra emissions
Net Weekly Balance:
Water: 1050L saved - 420L wasted = 630L NET SAVED
Energy: 35kWh saved - 10.7kHz extra = 24.3kWh NET SAVED
Carbon: 10kg reduced - 15kg extra = -5kg NET INCREASE
Self-Reflection Questions:
1. Which conservation actions were easiest?
2. Which wasteful habits are hardest to change?
3. What one change could make biggest difference?
4. How can I convert pressure activities into conservation?
Conversion Strategies:
| Pressure Activity | Conversion to Conservation |
|---|---|
| Left charger plugged in | Use power strip, switch off at night |
| Used paper plates | Use reusable plates, wash and reuse |
| Left tap running | Use mug of water for brushing |
| Threw food | Take smaller portions, save leftovers |
| AC at 18°C | Set at 24°C, use fan with AC |
Weekly Improvement Plan:
• This week: Fix 2 pressure activities
• Next week: Add 1 new conservation habit
• Month goal: Achieve positive net impact in all categories
Remember: Awareness is the first step. Tracking your actions helps identify patterns and opportunities for improvement. Everyone has both conservation and pressure activities - the goal is to increase the former and reduce the latter.
On the basis of the issues raised in this chapter, what changes would you incorporate in your lifestyle in a move towards sustainable use of our resources?
Based on the principles discussed in Chapter 16, here are comprehensive lifestyle changes for sustainable resource use:
1. Adopt Sustainable Consumption Philosophy:
Immediate Changes (Starting Today):
| Area | Change | Sustainability Principle |
|---|---|---|
| Water | • Install aerators on taps • Use bucket for bathing • Collect greywater for plants • Report leaks immediately |
Equitable distribution, conservation for future |
| Energy | • Switch to 100% LED lighting • Unplug devices when not in use • Use natural light maximally • Hang clothes to dry naturally |
Reduce fossil fuel dependence, prevent pollution |
| Transport | • Walk/cycle for distances under 2 km • Use public transport daily • Start a carpool group • Plan trips efficiently |
Reduce petroleum consumption, lower emissions |
| Food | • Adopt "Meatless Mondays" • Buy local and seasonal • Reduce food waste by 50% • Start kitchen gardening |
Reduce water footprint, support local economy |
2. Medium-term Changes (Within 6 Months):
| Change | Implementation | Expected Impact |
|---|---|---|
| Home Energy Audit | • Identify energy wastage points • Install solar water heater • Improve home insulation • Switch to energy-efficient appliances |
Reduce electricity bill by 30-40% |
| Zero Waste Kitchen | • Compost all organic waste • Use cloth instead of paper towels • Buy in bulk to reduce packaging • Use reusable containers |
Reduce kitchen waste by 80% |
| Sustainable Wardrobe | • Buy quality over quantity • Choose natural fabrics (cotton, wool) • Learn basic mending skills • Organize clothing swaps |
Reduce textile waste, save resources |
| Digital Minimalism | • Reduce streaming time • Clean digital clutter regularly • Extend device lifespan • Proper e-waste disposal |
Reduce energy consumption of data centers |
3. Long-term Changes (Within 1-2 Years):
| Change | Strategy | Sustainability Impact |
|---|---|---|
| Energy Independence | • Install rooftop solar panels • Use solar cookers regularly • Invest in community solar • Switch to electric vehicle when replacing car |
Become carbon neutral in energy use |
| Water Self-sufficiency | • Install complete rainwater harvesting • Create greywater recycling system • Landscaping with native drought-resistant plants • Monitor water footprint of all purchases |
Reduce municipal water use by 70% |
| Circular Living | • Repair cafe participation • Buy only pre-owned when possible • Compost human waste (if feasible) • Create closed-loop systems at home |
Minimize resource extraction needs |
| Community Building | • Start neighborhood sharing program • Create community garden • Establish tool/library sharing • Organize local sustainability events |
Build resilient, resource-efficient community |
4. Mindset and Behavioral Changes:
Shift from:
OWNERSHIP → ACCESS
DISPOSABLE → DURABLE
QUANTITY → QUALITY
INDIVIDUAL → COMMUNITY
5. Specific Action Plan Based on Chapter Learnings:
From Forest Management Lessons:
• Plant and nurture 10 native trees annually
• Use FSC-certified wood products only
• Support community forest initiatives
• Reduce paper consumption by 75%
From Water Management Lessons:
• Harvest rainwater equivalent to annual consumption
• Reduce water footprint below 100 liters/day
• Support river rejuvenation projects
• Practice traditional water conservation methods
From Fossil Fuel Management Lessons:
• Achieve carbon neutrality through reduction and offsets
• Transition to 100% renewable energy
• Reduce personal petroleum consumption by 90%
• Advocate for sustainable energy policies
6. Monitoring and Accountability:
• Monthly: Track electricity, water, fuel consumption
• Quarterly: Calculate carbon footprint
• Annually: Audit lifestyle sustainability
• Use apps: For tracking resource use
7. Education and Advocacy:
• Educate at least 10 people annually about sustainability
• Volunteer 50 hours/year for environmental causes
• Support 3 environmental organizations
• Practice and promote sustainable living on social media
Expected Outcomes in 2 Years:
• Carbon footprint: Reduce by 70% (from 2 tons to 0.6 tons CO₂/year)
• Water consumption: Reduce to 80 liters/day (national average: 135)
• Waste generation: Reduce to 0.5 kg/day (national average: 0.8)
• Energy: Generate 50% from renewable sources
• Influence: Inspire 5 families to adopt similar changes
Challenges and Solutions:
• Cost: Start with no-cost changes, then invest in long-term savings
• Convenience: Create new habits through consistency
• Social pressure: Lead by example, don't preach
• Information overload: Focus on one change at a time
Remember: Sustainability is a journey, not a destination. Start with what's achievable, build momentum, and continuously improve. The cumulative impact of millions adopting such lifestyles can transform our relationship with natural resources.
PhysicsExamsPrep.com - Launching For Your Exam Success