Chapter 2: Natural Capital, Linkages between the Economy and the Environment, and Pollution
Learning Objectives
Describe the three components of natural capital and give specific examples of each type
Components include natural resource capital, ecosystems, and their functions.
Describe ways to reduce residuals in the economy
Importance of minimizing waste through production processes or recycling.
Describe the different categories of pollution and contrast the degree of complexity in reducing emissions
Understand various pollutants and their characteristics impacting policymaking.
What is Natural Capital?
Definition: Natural capital consists of natural resources and ecosystem services that provide goods and services essential for human life and economic activities.
Components of Canada's Natural Capital
Natural Resource Capital: Includes renewable and non-renewable resources.
Examples:
Minerals
Energy
Forests
Fish
Ecosystems or Environmental Capital:
Functions:
Providing fresh drinking and irrigation water via watersheds.
Assimilating pollution in the air, water, and soil.
Controlling water runoff through wetlands.
Why is it Called ‘Capital’?
Store of Value: Natural capital holds significant inherent value.
Production Capable: It can generate goods and services, acting as an input in production processes.
Depletable: Natural capital can be depleted without proper reinvestment to sustain its stock.
Impacts of Natural Capital Use
Stocks Drawdown: Using natural capital depletes resources for future availability.
Example: Overfishing reduces future fish stocks.
Creation of Residuals: Utilization of natural capital generates waste.
For instance, seafood processing contributes to ocean pollution.
Degradation of Stocks: Waste products can harm natural capital stocks, affecting species reproduction.
Example: Polluted environments hinder fish reproduction.
Circular Flow for the Environment
Concept: The circular flow model indicates that inputs and outputs in economic systems relate closely to natural capital.
Process:
Inputs of natural capital produce goods; waste (residuals) is generated in the process.
Effective waste treatment and recycling are crucial to reducing environmental impacts.
Reducing the Flow of Residual Wastes into the Environment
Figure 2-1: Comprehensively illustrates the principle of input-output balance, showing methods to cut down residuals.
Three Methods to Reduce Inputs of Natural Capital:
Reduce Quantity of Goods and Services:
This method is controversial as it suggests a reduction in economic activity or population.
Reduce Residuals from Production:
Focuses on pollution prevention through cleaner production technologies and eco-friendlier goods.
Increase Recycling:
Reusing waste minimizes resource extraction and lowers pollution.
Example: Recycling aluminum cans lessens the need for bauxite extraction.
Types of Pollutants
Understanding types of pollutants is pivotal for creating effective policies aimed at reducing pollution harm.
Categories of Pollutants
Accumulative vs. Non-accumulative:
Accumulative Pollutants: Remain in the environment longer, leading to larger compound effects.
Harder to manage due to the necessity of considering past, present, and future emissions.
Non-accumulative Pollutants: Short-lived and dispersive, assimilate quickly into the environment.
Local vs. Regional and Global Pollutants:
Local Pollutants: Impact confined areas, easier to detect and control; both emitters and victims are identifiable in a localized context.
Regional/Global Pollutants: Can disperse over long distances, complicating identification and control measures.
Point Source vs. Non-point Source:
Point Source Pollutants: Arise from identifiable locations; easier to monitor and manage emissions.
Non-point Source Pollutants: Come from multiple, often unidentified sources; difficult to trace and regulate.
Continuous vs. Episodic Pollutants:
Continuous Pollutants: Emitted steadily (e.g., vehicle emissions when operated).
Easier to control due to consistent monitoring opportunities.
Episodic Pollutants: Released irregularly; harder to quantify and address due to their sporadic timing.
Emissions Test Examples
Classifications of pollutants based on various characteristics:
Automobile GHG emissions: Accumulative, Global, Point Source, Continuous.
Sulphur dioxide emissions from a power plant: Accumulative, Regional, Point Source, Continuous.
A loud party next door: Non-accumulative, Local, Point Source, Episodic.
Stormwater sewer overflow after a heavy rain: Non-accumulative, Local, Non-point Source, Episodic.
Canada’s Air Pollution
Evaluating Canada’s air pollution measures in comparison with both developed and developing nations.
Trends in air pollution improvement or deterioration over time.
Analysis of greenhouse gas emissions trends within Canada, connected to policy effectiveness and industrial practices.
Chapter Overview
The chapter articulated how economies can sustain their societal needs while preserving natural capital.
Contrasted natural resource economics with environmental economics.
Discussed the circular flow of resources illustrating that pollution can only be mitigated by reducing the inputs of natural capital into economic systems.
Outlined mechanisms for reducing residuals, emphasizing the importance of both production efficiency and recycling.
Note: The structural format of these notes is derived from multiple pages of a transcript that delves into the linkage between the economy, environment, and pollution management strategies.