Key Topics Covered Lecture 1

II. Key Definitions

1. What is Sustainable Development?

  • Defined by the Brundtland Commission (1987) as:
    "Development that meets the needs of the present without compromising the ability of future generations to meet their own needs."

2. What is Sustainability?

  • Three Dimensions of Sustainability:

    1. Environmental Sustainability:

      • Humanity's consumption should not exceed nature's ability to replenish resources.

      • Pollution and greenhouse gas emissions should not surpass nature’s ability to restore balance.

    2. Social Sustainability:

      • Ensures universal human rights and access to basic needs (healthcare, education, transportation).

      • Protection from discrimination and respect for labor, cultural, and personal rights.

    3. Economic Sustainability:

      • Communities should have secure sources of livelihood and access to necessary resources.

      • Ensures economic independence globally.

III. History of Sustainable Development & UN SDGs

1. Establishment of the United Nations

  • Formed in 1945 after WWII to maintain peace and security, provide humanitarian aid, and uphold human rights.

2. Key Events Leading to SDGs

Year

Event

Significance

1972

Stockholm Declaration

Led to the formation of the UN Environment Programme.

1987

Brundtland Report (Our Common Future)

Introduced the term “Sustainability.”

1992

Rio Earth Summit

Led to the formation of the UN Framework Convention on Climate Change (UNFCCC).

1997

Kyoto Protocol

First global treaty to reduce greenhouse gas emissions.

2000

Millennium Development Goals (MDGs)

Eight goals aimed at reducing poverty by 2015.

2015

Paris Agreement

International commitment to limit global warming to below 2°C, with efforts to stay under 1.5°C.

2015

Sustainable Development Goals (SDGs)

17 Goals with a 2030 target (Agenda 2030).

  • SDGs vs. MDGs:

    • MDGs (2000-2015): Focused mainly on poverty reduction and basic needs.

    • SDGs (2015-2030): A broader agenda covering climate action, sustainability, and economic growth.

IV. Environmental Impact Metrics

1. Ecological Footprint

  • Measures how much land is required to sustain an individual's lifestyle.

  • Includes food, water, housing, transportation, and other essential needs.

  • Average footprint per person:

    • U.S.: 8.4 hectares

    • Biocapacity of U.S.: 3.76 hectares per person (meaning the U.S. is in an ecological deficit).

2. Biocapacity

  • Refers to the Earth's ability to regenerate resources and absorb waste.

  • If ecological footprint > biocapacity, a country is overusing resources unsustainably.

3. Carbon Footprint

  • Total greenhouse gas emissions (CO₂, methane) from human activity.

  • Average carbon footprint per year:

    • U.S.: 16 tons per person.

    • Global average: 4 tons per person.

    • To prevent a 2°C rise, the global carbon footprint must be under 2 tons per person by 2050.

4. Overshoot Day

  • The date when humanity’s resource consumption exceeds Earth’s ability to regenerate those resources.

  • 2023 Overshoot Day: August 2 (after this, we are using resources beyond what Earth can sustain).

V. Ecosystem Services

  • The benefits that humans receive from nature.

  • Types of Ecosystem Services:

    1. Provisioning Services:

      • Tangible resources like water, food, wood, and raw materials.

    2. Regulating Services:

      • Natural processes that regulate the environment (air and water purification, flood control, climate regulation).

    3. Supporting Services:

      • Fundamental ecosystem functions (nutrient cycling, soil formation, pollination).

    4. Cultural Services:

      • Non-material benefits (aesthetic, spiritual, recreational, and cultural value).

  • Estimated annual value of ecosystem services: $33 Trillion.

VI. Nature-Based Solutions (NBS)

  • Defined as actions that protect, manage, or restore natural ecosystems while addressing societal challenges.

  • Examples:

    • Restoring wetlands to prevent flooding.

    • Planting urban forests for air purification and cooling.

1. Key Organizations Working on NBS

  • IUCN (International Union for Conservation of Nature)

  • World Bank

  • UNFCCC (United Nations Framework Convention on Climate Change)

  • World Wildlife Fund (WWF)

2. IUCN Global Standard for NBS

  • Includes 8 criteria:

    1. Address societal challenges.

    2. Operate at a landscape scale.

    3. Provide biodiversity gains.

    4. Ensure economic viability.

    5. Have governance capability.

    6. Balance trade-offs equitably.

    7. Utilize adaptive management.

    8. Be mainstreamed in policy frameworks.

VII. Additional Key Concepts

1. Ecological Engineering

  • Designing ecosystems to self-sustain.

  • Example: Wetland creation to filter wastewater.

2. Biomimicry

  • Designing human-made solutions based on nature.

  • Example: Wind turbine blades inspired by whale fins.

3. Renaturing

  • Restoring ecosystems while integrating them into human environments.

  • Example: Urban green spaces in cities.

4. Natural Capital

  • The Earth's natural resources and ecosystem services that provide economic and societal benefits.

  • Examples:

    • Forests (carbon sequestration, timber).

    • Oceans (fisheries, climate regulation).