What Is the Ecological Footprint and What Does It Tell

Multiple Choice

What is the ecological footprint and what does it tell us?

A) The ecological footprint captures carbon emissions. It tells us about global warming.
B) The ecological footprint is an analysis that converts various demands into area. It tells us that we are currently using 1 Earth.
C) The ecological footprint is an analysis that converts various demands into area. It tells us that we are currently using 1.5 Earths.
D) The ecological footprint analyzes different types of energy production. It tells us what percentage of energy we consume from different sources.