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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.

Question 1

What changes would you suggest in your home in order to be environment-friendly?

Answer:

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.
Question 2

Can you suggest some changes in your school which would make it environment-friendly?

Answer:

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.
Question 3

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?

Answer:

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
Local People (Primary) + Forest Department (Technical) + Industry (Regulated Use) + Conservationists (Advisory)

Sustainable Forest Management
Evidence from Success Stories:
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.
Question 4

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?

Answer:

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.
Question 5

What can you as an individual do to reduce your consumption of the various natural resources?

Answer:

Reducing consumption of natural resources requires mindful daily choices. Here's a comprehensive guide:

1. Follow the 5Rs (Refuse, Reduce, Reuse, Repurpose, Recycle):
REFUSE (unnecessary items) → REDUCE (what you need) → REUSE (what you have) → REPURPOSE (creatively) → RECYCLE (what remains)

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:
1. Do I REALLY need this?
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):
BEST: Walk → Cycle → Public Transport → Carpool → Drive Alone (LAST OPTION)

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.
Question 6

List five things you have done over the last week to (a) conserve our natural resources (b) increase the pressure on our natural resources.

Answer:

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:
Conservation - Pressure = Net Impact
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.
Question 7

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?

Answer:

Based on the principles discussed in Chapter 16, here are comprehensive lifestyle changes for sustainable resource use:

1. Adopt Sustainable Consumption Philosophy:
NEED vs WANT Analysis → MINIMALISM → SHARING ECONOMY → CIRCULAR THINKING

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:
CONSUMER → CONSERVER
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.
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