What is the difference between ecological footprint and biodiversity footprint?

• A. Ecological footprint gauges humanity’s demand on nature globally; biodiversity footprint assesses our impact specifically on ecosystems and species.
• B. They are identical concepts.
• C. Biodiversity footprint measures carbon emissions only.
• D. Ecological footprint measures only land area.

Answer: (A)

The main idea is to distinguish what each footprint measures: demand on nature versus pressure on living systems. The ecological footprint quantifies humanity’s demand on nature globally—how much productive land and water area is needed to supply resources and absorb wastes for a given level of consumption. The biodiversity footprint, on the other hand, focuses on the impact on the living components of nature—how those activities affect ecosystems and species, such as habitat loss, degradation, and risk of extinction. So the ecological footprint is about the scale of resource demand, while the biodiversity footprint is about the health and diversity of ecosystems affected by that demand. The other options misrepresent the scope: they’re not identical, biodiversity footprint isn’t carbon-only, and the ecological footprint isn’t limited to land area.