Environmental Science 101: Environmental Policy and Law - MarketBased Instruments Emissions Trading Carbon Tax Subsidies DepositRefund Systems

What This Is

Market-Based Instruments (MBIs) are economic tools used to control pollution and mitigate climate change. These instruments aim to internalize environmental externalities by creating a financial incentive for individuals and organizations to reduce their environmental impact. A classic example of the need for MBIs is the tragedy of the commons, where shared resources like fisheries are overfished due to individual self-interest. In the 1970s, the North Atlantic cod fishery collapsed due to overfishing, resulting in significant economic and social losses.

Key Concepts, Laws & Models

• Emissions Trading: A system where companies can buy and sell permits to emit greenhouse gases, creating a financial incentive to reduce emissions. Real-world example: The European Union's Emissions Trading System (EU ETS) has led to a 21% reduction in greenhouse gas emissions from power plants and industrial processes.
• Carbon Tax: A tax on the carbon content of fossil fuels, providing a financial incentive to switch to cleaner energy sources. Real-world example: Sweden's carbon tax has led to a 20% reduction in greenhouse gas emissions from transportation and industry.
• Subsidies: Financial incentives for companies to adopt environmentally friendly practices or technologies. Real-world example: The US government's tax credits for wind energy have led to a 20-fold increase in wind energy capacity.
• Deposit-Refund Systems: A system where consumers pay a deposit on a product and receive a refund when they return the empty container. Real-world example: Germany's deposit-refund system for beverage containers has led to a 99% recycling rate.
• Kyoto Protocol: An international agreement to reduce greenhouse gas emissions, with countries setting binding targets for emissions reduction. Real-world example: The Kyoto Protocol led to a 10% reduction in greenhouse gas emissions from developed countries.
• Paris Agreement: An international agreement to limit global warming to well below 2°C and pursue efforts to limit it to 1.5°C above pre-industrial levels. Real-world example: The Paris Agreement has led to a global commitment to reduce greenhouse gas emissions and transition to renewable energy sources.
• Cap-and-Trade: A system where a cap is set on the total amount of emissions allowed, and companies can buy and sell permits to emit greenhouse gases. Real-world example: California's cap-and-trade system has led to a 10% reduction in greenhouse gas emissions from industry and transportation.
• Carbon Pricing: A system where a price is placed on carbon emissions, providing a financial incentive to reduce emissions. Real-world example: The World Bank's carbon pricing initiative has led to a global carbon price of over $10 per ton of CO2.
• Green Certificates: A system where companies can buy and sell certificates representing a certain amount of renewable energy. Real-world example: The US Renewable Portfolio Standard (RPS) has led to a 20-fold increase in renewable energy capacity.
• Sustainable Development Goals (SDGs): A set of global goals to achieve sustainable development and reduce poverty. Real-world example: The SDGs have led to a global commitment to reduce greenhouse gas emissions and transition to renewable energy sources.

Step-by-Step Application

1. Calculate a carbon footprint using the following formula: Carbon Footprint (kg CO2e) = (Energy Consumption (kWh) x Emissions Factor (g CO2e/kWh)) + (Transportation Emissions (km) x Emissions Factor (g CO2e/km)).
2. Evaluate an environmental impact assessment by considering the following factors: scope, methodology, data quality, and conclusions.
3. Predict population growth using the rule of 70: Population Growth Rate (year) = 70 / Doubling Time (years).
4. Calculate the cost-effectiveness of a carbon pricing scheme using the following formula: Cost-Effectiveness (€/ton CO2) = (Carbon Price (€/ton CO2) x Emissions Reduction (ton CO2)) / Total Cost (€).
5. Evaluate the effectiveness of a deposit-refund system by considering the following factors: participation rate, recycling rate, and waste reduction.

Common Misconceptions

• Misconception: "Global warming is caused by the ozone hole."
• Correction: The ozone hole is a separate issue caused by the depletion of ozone in the stratosphere, primarily due to the release of chlorofluorocarbons (CFCs). Global warming is caused by the increase in greenhouse gases, primarily carbon dioxide, in the atmosphere.
• Misconception: "All pollutants are visible."
• Correction: Many pollutants, such as particulate matter and ozone, are not visible but can still have significant health and environmental impacts.
• Misconception: "Renewable energy has no environmental impact."
• Correction: While renewable energy sources like solar and wind have a lower environmental impact than fossil fuels, they can still have environmental impacts, such as land use and habitat disruption.

Exam / Free-Response Tips

• Be aware of common multiple-choice traps, such as "all of the above" or "none of the above."
• Use specific examples and data to support your answers in free-response questions.
• Clearly distinguish between different concepts, such as "weather vs climate" or "primary vs secondary succession."
• Use the correct terminology and definitions in your answers.

Quick Practice Scenario

A farmer applies excessive nitrogen fertilizer to their crops. The runoff reaches a nearby lake, causing an algal bloom. Which nutrient cycle is disrupted, and what secondary effect will deplete oxygen?

Answer: The nitrogen cycle is disrupted, leading to an overabundance of nitrogen in the lake, which will stimulate the growth of algae, depleting oxygen in the lake.

Last-Minute Cram Sheet

• "Emissions Trading" is not the same as "Cap-and-Trade" – Emissions Trading is a broader concept, while Cap-and-Trade is a specific system.
• The Kyoto Protocol was signed in 1997 and came into effect in 2005.
• The Paris Agreement was signed in 2015 and came into effect in 2016.
• The World Bank's carbon pricing initiative aims to price carbon at $100 per ton of CO2 by 2025.
• The European Union's Emissions Trading System (EU ETS) covers over 11,000 power plants and industrial processes.
• The Renewable Portfolio Standard (RPS) requires utilities to generate a certain percentage of their electricity from renewable sources.
• Green Certificates are traded on the European Climate Exchange (ECX).
• The Sustainable Development Goals (SDGs) were adopted by the United Nations in 2015.
• The Tragedy of the Commons was first described by Garrett Hardin in 1968.
• The First Law of Thermodynamics states that energy cannot be created or destroyed, only converted.