Environmental Science 101: Sustainability - Sustainable Development Brundtland Commission Triple Bottom Line People Planet Profit

What This Is

Sustainable Development is a concept that balances human well-being with environmental protection and economic viability. It's based on the Brundtland Commission's definition: "meeting the needs of the present without compromising the ability of future generations to meet their own needs." This concept is crucial for understanding Earth's systems and human-environment interactions, as it helps us manage resources, mitigate climate change, and ensure a livable future. For instance, the Amazon rainforest's deforestation affects not only biodiversity but also local communities and the global carbon cycle.

Key Concepts, Laws & Models

• Triple Bottom Line (TBL): A framework for evaluating sustainability by considering social, environmental, and economic impacts. Real-world implication: Companies like Patagonia and IKEA use TBL to measure their sustainability performance.
• Brundtland Commission: A 1983 UN report that defined sustainable development and emphasized the need for global cooperation. Real-world implication: The report led to the creation of the UN Environment Programme and the development of sustainable development goals.
• Ecological Footprint: A measure of human demand on the Earth's resources, including land, water, and energy. Real-world implication: The global ecological footprint is 1.7 times the Earth's biocapacity, indicating that we're living beyond our means.
• Cradle-to-Cradle Design: A design approach that aims to eliminate waste and pollution by using renewable resources and designing products for recyclability. Real-world implication: Companies like Nike and Coca-Cola have adopted cradle-to-cradle design principles to reduce their environmental impact.
• Life Cycle Assessment (LCA): A method for evaluating the environmental impacts of a product or service throughout its entire life cycle. Real-world implication: LCA has been used to assess the environmental impacts of products like cars and electronics.
• Sustainable Consumption and Production (SCP): A framework for reducing waste and pollution by promoting sustainable consumption and production patterns. Real-world implication: The SCP framework has been adopted by the UN and is being implemented by countries around the world.
• Green Economy: An economic system that prioritizes environmental protection and sustainable development. Real-world implication: The green economy has been promoted by the UN and is being implemented by countries like Costa Rica and Rwanda.
• Circular Economy: An economic system that aims to eliminate waste and pollution by designing products and systems for recyclability and reuse. Real-world implication: Companies like H&M and IKEA are adopting circular economy principles to reduce waste and pollution.

Step-by-Step Application

1. Calculate a carbon footprint: Use a carbon footprint calculator to estimate the greenhouse gas emissions associated with a product or activity. For example, a study found that a typical American's carbon footprint is around 16 tons of CO2 equivalent per year.
2. Evaluate an environmental impact assessment: Use a framework like the Environmental Impact Assessment (EIA) to evaluate the potential environmental impacts of a project or policy. For example, an EIA was conducted for the proposed Keystone XL pipeline, which highlighted the potential risks to water quality and wildlife habitats.
3. Predict population growth using the rule of 70: Use the rule of 70 to estimate population growth rates. For example, if a country's population is growing at a rate of 2% per year, its population will double in approximately 35 years.
4. Assess the environmental impacts of a product: Use a life cycle assessment (LCA) to evaluate the environmental impacts of a product throughout its entire life cycle. For example, an LCA of a smartphone found that its production process generates significant greenhouse gas emissions and e-waste.

Common Misconceptions

• Misconception: "Sustainable development is a new concept that only emerged in the 21st century."
• Correction: Sustainable development has been a concept since the 1983 Brundtland Commission report, which defined it as "meeting the needs of the present without compromising the ability of future generations to meet their own needs."
• Misconception: "All sustainable development initiatives are expensive and require significant investments."
• Correction: While some sustainable development initiatives may require significant investments, many others can be implemented at little or no cost. For example, reducing energy consumption through behavioral changes can save households money and reduce greenhouse gas emissions.
• Misconception: "Sustainable development is only relevant for developed countries."
• Correction: Sustainable development is relevant for all countries, regardless of their level of development. Developing countries face unique challenges related to poverty, inequality, and environmental degradation, and sustainable development can help address these challenges.

Exam/Free-Response Tips

• Multiple-choice traps: Be careful when answering multiple-choice questions, as some options may be designed to distract you from the correct answer. For example, a question might ask about the benefits of sustainable development, but the correct answer might be a negative consequence (e.g., "job losses due to reduced resource extraction").
• Free-response questions: When answering free-response questions, make sure to provide specific examples and evidence to support your answers. For example, if a question asks about the environmental impacts of a product, provide a specific example of a product and its associated environmental impacts.
• Distinctions: Be careful when making distinctions between related concepts. For example, the difference between "weather" and "climate" is often misunderstood, with some people using the terms interchangeably.

Quick Practice Scenario

A farmer applies excessive nitrogen fertilizer to a field, causing runoff that reaches a nearby lake and causes 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 deplete oxygen levels as algae consume oxygen during decomposition.

Last-Minute Cram Sheet

• Brundtland Commission: 1983 UN report that defined sustainable development.
• Triple Bottom Line (TBL): Framework for evaluating sustainability by considering social, environmental, and economic impacts.
• Ecological Footprint: Measure of human demand on the Earth's resources.
• Cradle-to-Cradle Design: Design approach that aims to eliminate waste and pollution.
• Life Cycle Assessment (LCA): Method for evaluating the environmental impacts of a product or service.
• Sustainable Consumption and Production (SCP): Framework for reducing waste and pollution by promoting sustainable consumption and production patterns.
• Green Economy: Economic system that prioritizes environmental protection and sustainable development.
• Circular Economy: Economic system that aims to eliminate waste and pollution by designing products and systems for recyclability and reuse.
• El Niño: Not the same as La Niña – El Niño is warm phase; La Niña is cool phase, and both are part of the ENSO cycle.
• Sustainable development: Not a new concept – emerged in the 1980s with the Brundtland Commission report.
• All sustainable development initiatives are expensive: Not true – many initiatives can be implemented at little or no cost.