"What are the factors that determine the "ecological footprint" of human beings? Using examples from around the globe, this video looks at how the world's resources are consumed by populations at different levels of economic and technological development. What does this mean for the future, considering current trends in the size, distribution and consumption patterns of the global population? The video stresses the importance of ecological sustainability, and prompts students to think about the opportunities and obstacles surrounding the adoption of sustainable practices." - case.