chapter 4 NR
Page 1: Introduction to Natural Resources
Overview
Chapter Title: Natural Resources
Author: Bedada Teressa (MSc), Department of Economics
Page 2: Focus of the Chapter
Main Areas of Focus
Extraction: The process of withdrawing resources from nature.
Depletion: The usage leading to the exhaustion of resources.
Protection: Preservation measures for future resource availability.
Management: Responsible use of resources considering economic, environmental, and social impacts.
Page 3: Definition and Classification
Definition of Natural Resources
Natural Resource: Any source of wealth occurring naturally.
Classification Based on Source
Biotic: Derived from living organic materials.
Examples: Plant and animal species.
Abiotic: Derived from non-living inorganic materials.
Examples: Land, metal minerals, water, air.
Page 4: Resources Based on Stage of Development
Classification Based on Development Stage
Potential Resources: Available resources that can be utilized in the future.
Example: Petroleum in sedimentary rocks.
Actual Resources: Resources that have been surveyed, with known quantities and qualities, and are currently in use.
Reserve Resources: Portions of actual resources designated for profitable future use.
Stock Resources: Surveyed resources that cannot currently be utilized due to technological limitations.
Example: Hydrogen.
Page 5: Resources Based on Renewability
Classification Based on Renewability
Non-renewable Resources: Limited in quantity and regenerate insignificantly compared to use rates.
Examples: Minerals and fossil fuels.
Renewable Resources: Can be replenished faster than they are consumed.
Examples: Solar energy, air, wind, and living species.
Page 6: Non-renewable Resources
Characteristics and Optimal Extraction
The growth rate for non-renewable resources is essentially zero; once extracted, they cannot be renewed.
Optimal Depletion
Reserve to Use Ratio (RTUR): Static optimal depletion measurement.
RTUR Formula: RTUR = Current Reserve / Annual Use
Example Calculation: If the current reserve is 25,000,000 tons and annual use is 500,000 tons, it takes 50 years to deplete (RTUR = 25,000,000 tons / 500,000 tons).
Limitations: RTUR does not account for demand changes or price variations.
Page 7: Dynamic Efficiency in Resource Utilization
Dynamically Efficient Allocation
Maximizes the present value of net benefits (PV(NB)).
Example: Oil Extraction
Demand and marginal cost equations determine optimal extraction rates.
Static allocation requires 30 barrels of reserves for maximum efficiency, which exceeds the available stock.
Page 8: Extraction Options
Two Possible Extraction Strategies
Extract 15 barrels in Period 1, leaving 5 barrels for Period 2.
Extract 5 barrels in Period 1, leaving 15 barrels for Period 2.
Page 9: Evaluation of Options
Better Extraction Strategy
Suggestion: The first option is better, but not necessarily maximizing present value.
Page 10: Maximizing Present Value of Net Benefits
Optimal Resource Allocation
Maximum PV(NB) occurs when present value of marginal net benefits (PV(MNB)) across time periods equals each other: PV(MNB)1 = PV(MNB)2.
Page 11: Formula for PV(MNB)
Calculation of Marginal Net Benefits
PV(MNB)1 and PV(MNB)2 calculations involve demand (MB) and marginal extraction cost (MEC) analysis to find optimal values.
Page 12: Net Benefit Calculations in Two-Period Model
Period-Specific Calculations
Present value of MB minus MC is calculated for each period to determine optimal extraction levels.
Graphical representation of net benefits across two periods.
Page 13: Marginal User Cost (MUC) Definition
MUC Concept
MUC represents opportunity cost related to current consumption.
Calculation examples provided for different periods.
Page 14: Price and MUC Analysis
Price and Marginal User Cost Chart
Displays the relationship between price and MUC in both periods, with calculations highlighting the differences.
Page 15: Generalization to N Periods
Transition in Non-Renewable Resource Management
Resource exhaustion occurs when MEC plus MUC equals reservation price.
Choke price implications for resource demand and availability.
Page 16: Timing of Resource Exhaustion
Discovery Transition
Summary of the relationship between time and resource exhaustion related to new findings.
Page 17: Choke Price Determinants
Transition to Other Non-Renewable Resources
Discussion on resource quality and different resource types impacting choke pricing.
Page 18: Non-Renewable Resource Transition Diagram
Multiple Non-Renewable Transition Dynamics
Graph depicting exhaustion timeframes of various non-renewable resources.
Page 19: Market Efficiency Issues
Market Dynamics and Efficiency
Conditions affecting dynamic efficiency include incomplete markets, asymmetric information, externalities, public goods and market structure influences (e.g., monopoly).
Page 20: Energy Resources Overview
Energy as a Critical Resource
Energy sources: Beyond basic sustenance, essential for all aspects of life.
International Energy Agency (IEA) stats: Oil and natural gas comprise a significant share of energy supply.
Page 21: Challenges with Energy Resources
Problems and Solutions for Energy Management
Depletable energy sources lead to concerns about sustainability and climate change.
Recommended interventions include regulations, policy development, and transition strategies toward renewable sources.
Page 22: Minerals Classification
Characteristics of Mineral Resources
Discussion of recyclability and the factors impacting scarcity, such as discovery and technology.
Page 23: Renewable Resources Overview
Characteristics of Renewable Resources
Definition highlighting replenishment and sustainability.
Page 24: Fisheries Management
Biological Dimensions
Factors impacting fish population dynamics, including MSY.
Page 25: Population Dynamics of Fishery Resources
Stock Growth Analysis
Illustrative growth model outlining population viability and management challenges.
Page 26: Static Sustainable Yield Assumptions
Sustainable Yield in Fisheries
Discussion of constant price and marginal cost impacts on fishing efficiency.
Page 27: Efficient Harvest Levels in Fisheries
Harvesting Metrics
Key terms defined regarding efficient effort levels and comparison of economic metrics.
Page 28: Dynamic Sustainable Yield Considerations
Dynamic Efficiency Framework
Evaluating costs over time and their impact on fishing resource sustainability.
Page 29: Market Allocation Dynamics in Fishing
Graphical Representation of Fishing Efforts
Analyzing the balance between cost and benefit in fishery efforts.
Page 30: Long-Term Policies for Fisheries
Addressing Overexploitation
Effective policy measures to regulate fishing efforts and ensure resource sustainability.
Page 31: Strategic Solutions for Fishery Efficiency
Proposed Management Strategies
Various strategies evaluated from privatization to regulatory measures aimed at reducing fishing pressure.
Page 32: Regulatory Framework in Fishery Management
Regulatory Measures Explained
Overview of regulations designed to sustain fish populations and mitigate overharvesting.
Page 33: Regulation Impact on Fisheries
Cost-Benefit Analysis of Regulation
Visual representation illustrating the effects of regulatory measures on fishing efforts.
Page 34: Issues Beyond Overfishing
Broader Challenges in Fisheries
Exploration of habitat destruction and conflicts among user groups affecting fishery resources.
Page 35: Forest Resources Overview
Importance of Forests
Ecological and economic contributions of forests highlighted, including energy sources and CO2 absorption.
Page 36: Optimal Harvesting Period for Forests
Harvesting Strategies
Maximizing growth-based approaches for forest management and economic efficiency.
Page 37: Harvesting Volume Analysis
Metrics of Timber Harvesting
Data on harvesting volumes illustrating optimal ages for cutting based on bio-economic assessments.
Page 38: Forest Harvesting Economics
Net Benefit Assessments
Discussion of static versus dynamic harvesting periods focusing on net present value maximization.
Page 39: Inefficiencies in Forest Management
Sources of Inefficiency Defined
Examination of various structural constraints leading to resource overuse or loss.
Page 40: Sustainable Forestry Practices
Strategies for Sustainable Management
Conservation measures and economic strategies discussed to promote forest sustainability.