Define ecological footprint and explain its relevance to geography.

• A. A measure of climate variability over a region.
• B. A measure of the land required to supply resources and absorb wastes for a population; helps compare sustainability across regions.
• C. A measure of biodiversity within a city.
• D. A measure of soil fertility for agriculture.

Answer: (B)

The ecological footprint measures how much land and water area a population would need to supply the resources it consumes and to absorb its wastes, given current technology and practices. In geography, this idea matters because it ties human activity directly to the physical space and biophysical capacity of places, showing how much of the Earth’s productive area a region uses and whether that use is sustainable over time. Expressed in common units like global hectares, it lets us compare regions: some areas operate within their ecological means, while others place heavy demands on ecosystems, signaling sustainability challenges. By comparing footprints across cities, regions, or countries, geographers can assess patterns of resource use, energy, food systems, and waste management, and think about ways to reduce pressure on the environment. It isn’t about climate variability, biodiversity, or soil fertility, which are different geographic concepts.