Environmental Protection and Negative Externalities

Introduction to Environmental Protection: The Keystone XL Pipeline Case Study

• The Conflict: The Keystone XL pipeline represents the ongoing debate between economic growth and environmental preservation. It was a private venture by TransCanada designed to transport oil from Canada to refineries near the Gulf of Mexico, intended to increase crude oil production and economic growth.
• Supportive Arguments:
  • Economic Gain: Proponents argued it would foster manufacturing, reduce domestic price pressure at gas pumps, and stimulate overall economic growth.
  • Energy Security: Supporters believed it would reduce dependence on oil imports from politically unstable Middle Eastern regions.
  • Safety: It was marketed as being among the safest pipelines ever constructed.
• Critical Arguments:
  • Ecological Risks: Opponents noted the pipeline would cross a massive aquifer in the Midwest and environmentally sensitive areas in Nebraska.
  • Potential Damage: Concerns included leaks tainting water sources and construction harming indigenous species.
• Regulatory History:
  • November 2015: The Obama administration denied the necessary cross-border permit.
  • 2017: The Trump administration attempted to grant the permit, leading to legal challenges.
  • 2021: On his first day in office, President Biden canceled the permit, effectively ending the project.
• Economic Considerations: This case highlights the difficulty of valuing the environment. Economists must weigh whether the benefits of such projects outweigh the opportunity costs and unintended planetary effects.

The Historical Context of Pollution in the United States

• Extreme Pollution: By 1969, pollution was severe enough that the Cuyahoga River in Ohio spontaneously ignited.
• Chattanooga, Tennessee: In the late 1960s, air pollution was so hazardous that:
  • The death rate from tuberculosis was double the state average and triple the national average.
  • The air was acidic enough to melt nylon stockings off women's legs.
  • Executives kept white shirts in their offices to change into when their original shirts turned gray from soot.
  • Visibility was so low that car headlights were used at high noon.
• Economic Ubiquity: Pollution is a problem for every economy, whether they are high-income or low-income, and whether they are market-oriented or command-oriented. Each must find a balance between production and quality of environment.

12.1 The Economics of Pollution and Externalities

• Progress Since 1990: Between 1990 and 2023, the U.S. population grew by roughly $38\%$ and the economy grew more than $3.5\text{-fold}$. Despite this, anti-pollution policies have reduced several pollutants.
• Carbon Dioxide ($CO_2$) Trends (Table 12.1):
  • Coal: Emissions dropped from $259\text{ MMT}$ in 1990 to $152\text{ MMT}$ in 2010, and down to $88\text{ MMT}$ in 2023 (a total reduction of $171\text{ MMT}$ or $66\%$).
  • Natural Gas: Emissions rose from $435\text{ MMT}$ in 1990 to $554\text{ MMT}$ in 2023.
  • Petroleum: Emissions dropped from $369\text{ MMT}$ in 1990 to $327\text{ MMT}$ by 2023.
  • Total industrial sector direct emissions: Decreased from $1,063\text{ MMT}$ (1990) to $969\text{ MMT}$ (2023).
• Externality Definition: An externality (or spillover) occurs when a market exchange affects a third party who is neither the buyer nor the seller.
  • Negative Externality: A situation where a third party suffers. Example: A neighbor playing loud country music that you dislike.
  • Positive Externality: A situation where a third party benefits. Example: A neighbor playing music you enjoy for free.
• Pollution as a Social Cost:
  • Private Costs: The costs a firm incurs to produce a good (labor, materials, etc.).
  • External Costs: Costs imposed on society (health issues, property value drops, wildlife harm).
  • Social Costs: The sum of private costs and external costs.

Market Failure and the Supply Shift Model

• Market Failure: Occurs when the private market fails to achieve efficient output because firms do not account for all costs (negative externality) or consumers do not account for all benefits (positive externality).
• The Refrigerator Example (Table 12.2 / Figure 12.2):
  • Initial Equilibrium ($E_0$): Costs are only private ($S_{\text{private}}$). Equilibrium Price = $\$650$, Equilibrium Quantity = $45,000\text{ units}$.
  • With Social Costs ($S_{\text{social}}$): If an external cost of $\$100$ per unit is added for pollution, the supply curve shifts up by $\$100$.
  • New Equilibrium ($E_1$): Equilibrium Price = $\$700$, Equilibrium Quantity = $40,000\text{ units}$.
  • Result: Accounting for social costs leads to a higher price, lower production, and less pollution.
• Work It Out: The Trumpet Playing Firm (Table 12.3):
  1. Identify Negative Externality: The noise pollution caused by the music.
  2. Initial Equilibrium (Private Only): Quantity Demanded ($5$) = Quantity Supplied ($5$) at Price = $\$10$.
  3. New Equilibrium (Social Costs Included): Quantity Demanded ($4$) = Adjusted Quantity Supplied ($4$) at Price = $\$12$.
  4. Comparison: Forcing the firm to pay for its externality increases price and decreases the quantity of the noise pollution.

12.2 Command-and-Control Regulation

• Definition: Laws that specify allowable quantities of pollution and/or detail the technologies firms must use to mitigate it.
• Key Legislation:
  • Environmental Protection Agency (EPA): Established in 1970 to oversee all environmental laws.
  • Clean Air Act (1970): Enacted to address atmospheric pollution.
  • Clean Water Act (1972): Passed to address aquatic pollution.
• Three Key Difficulties with Command-and-Control:
  1. No Incentive to Excel: Once a firm meets the legal standard, there is zero incentive to reduce pollution further.
  2. Inflexibility: It applies the same standards to all firms regardless of their specific costs or capabilities, offering no reward for innovative production methods.
  3. Political Loopholes: Regulations are subject to lobbying. Stricter standards often apply only to new firms (vanguard effect), while existing firms receive exceptions or loopholes.

12.3 Market-Oriented Environmental Tools

• Goal: To provide incentives and flexibility to reduce pollution at a lower cost to society.
• 1. Pollution Charges (Pollution Tax):
  • A tax on the quantity of emissions. Firms abate pollution if the Marginal Cost ($MC$) of abatement is less than the tax.
  • Example (Figure 12.3): A firm faces a $\$1,000$ tax for every $10\text{ lbs}$ of soot.
    • Abating the first $10\text{ lbs}$ costs $\$300$ (Abate).
    • The second $10\text{ lbs}$ costs $\$500$ (Abate).
    • The third $10\text{ lbs}$ costs $\$900$ (Abate).
    • The fourth $10\text{ lbs}$ costs $\$1,500$ (Pay Tax).
    • Total reduction: $30\text{ lbs}$.
  • Household examples: "Pay as you throw" garbage programs (over $7,000$ communities as of 2006) and gasoline taxes.
• 2. Marketable Permits (Cap-and-Trade):
  • The government sets an overall cap on pollution and issues permits allowing specific amounts. These permits are "marketable" (can be bought/sold) and often "shrinkable" (allowance decreases over time).
  • Dynamics (Table 12.4): Firms that can reduce pollution cheaply (like Firm Gamma) sell their excess permits to firms that find reduction expensive (like Firm Alpha) or to new entrants (Firm Delta).
  • Sulfur Dioxide: The 1990 Clean Air Act amendments used marketable permits to reduce sulfur dioxide (causing acid rain) from power plants.
• 3. Better-Defined Property Rights:
  • The Coase Theorem (Ronald Coase): Externalities can be resolved if property rights are clearly defined. In the case of railroad sparks burning a farmer's field, the legal right (who is responsible) dictates who pays for the fix (e.g., a fence or a gadget on the smokestack).
  • Endangered Species: Roughly $90\%$ of the $1,000$ species listed live on private land. Command-and-control policies often encouraged "shoot, shovel, and shut up." Market-oriented approaches suggest paying landowners to provide habitats.

12.4 Benefits and Costs of U.S. Environmental Laws

• Compliance Costs: U.S. firms pay over $\$200\text{ billion}$ annually to comply with federal environmental regulations.
• Benefit Categories:
  1. Improved health and increased longevity.
  2. Gains to industries like farming, fishing, and tourism.
  3. Higher property values.
  4. Intrinsic value/enjoyment of a clean environment.
• Evidence of Success:
  • EPA Study (1970–1990): Costs of Clean Air Act = $\$500\text{ billion}$; Benefits = $\$22\text{ trillion}$ ($44:1$ ratio).
  • 2010 Projections: Clean Air Act programs benefits estimated at $\$110\text{ billion}$ (avoiding illness/death).
  • Caveat: Some regulations for certain contaminants may have costs that exceed benefits; aggregate success does not guarantee individual policy efficiency.
• Ecotourism: A growing industry where nature appreciation drives revenue. The International Ecotourism Society projected $1.56\text{ billion}$ trips by 2020 (pre-COVID). In places like South Africa and Costa Rica, it gives locals a property-right interest in conservation.
• Marginal Analysis (Figure 12.4):
  • Marginal Benefit ($MB$) of protection decreases as protection increases.
  • Marginal Cost ($MC$) of protection increases as protection increases.
  • Optimal protection is at $Q_{b}$ where $MC = MB$. Beyond this ($Q_{c}$), society forfeits too many resources for too little gain.
• Value of a Statistical Life (VSL):
  • EPA (2006): $\$7.4\text{ million}$ (~$\$10.5\text{ million}$ in 2022 dollars).
  • Dept. of Transportation: Only approves safety rules costing $\$3\text{ million}$ or less per life saved.
  • W. Kip Viscusi estimated a $\$50\text{ million}$ regulatory cost might actually cost a life by diverting funds from health and safety elsewhere.

12.5 International Environmental Issues

• International Externalities: Problems like global warming and biodiversity loss that cross borders and cannot be solved by one nation alone.
• Biodiversity: The full spectrum of animal and plant genetic material.
• Paris Climate Agreement (2015):
  • Goal: Significant limits on $CO_2$ emissions. Joined by $196$ entities.
  • U.S. Clean Power Plan: Target to reduce power plant $CO_2$ by $17\%$ (pre-2005 levels) by 2020 and $32\%$ by 2030.
  • Politics: Trump administration withdrew; Biden rejoined in 2021.
• The Global Divide: Low-income countries often prioritize economic growth for health and education. High-income countries must often provide technology or payments (possibly via ecotourism) to incentivize poorer nations to protect the environment.

12.6 The Tradeoff between Economic Output and Environmental Protection

• Production Possibility Frontier (PPF):
  • Vertical Axis: Economic Output (e.g., Corn).
  • Horizontal Axis: Environmental Protection (e.g., Tree count or Gunk cleaned).
  • Point P: High output, low protection.
  • Point T: High protection, low output.
  • Point M: Productive Inefficiency (inside the curve). Nations should move from $M$ to the frontier (e.g., to point $Q$ or $S$).
• Income Effects: Low per capita GDP countries (like India) often choose points near $P$. High-income countries shift toward environmental protection. Economists argue that market-oriented tools prevent the productive inefficiency characteristic of poorly designed command-and-control laws.