What is Sustainability

Summary

Sustainability means meeting present needs without undermining the future. The video cites the U.N. Brundtland Commission’s definition of sustainable development: meeting today’s needs without compromising future generations’ ability to meet theirs. In practical terms, this means finding ways to live well now while allowing future generations to thrive.

Using resources sustainably

Renewable resources, such as trees and fish, can replenish—but only if they are used no faster than the systems that renew them. The video compares this balance to a bathtub: resource levels remain stable when the rate of use matches the rate of replenishment.

When resources are consumed faster than they can recover, their levels decline. The video points to disappearing fisheries and forests, climate change, and plastic pollution in the ocean as examples of problems associated with high consumption.

Thinking in systems

Sustainability requires understanding how decisions can affect people and places far beyond the decision-maker. For example, buying a smartphone can affect people elsewhere who mine the materials used to make it.

The three E’s

The video presents the three E’s—also known as the triple bottom line or the three legs of the stool—as a framework for sustainability:

• Environment
• Economy
• Equity

These dimensions are interconnected and need to be considered together:

• Focusing only on short-term profit can undermine the economy’s long-term health.
• Protecting the environment without considering people’s livelihoods may not support a thriving society.
• Ignoring equity can leave resources concentrated among a few while many people lack food or the means to live well.

Sustainability involves balancing all three dimensions and understanding how they affect one another.

Speakers and sources

• Speaker: One unnamed narrator.
• Source cited: The U.N. Brundtland Commission, for its definition of sustainable development.