The Typical Ecological Footprint for a Person in the United

question 37

Multiple Choice

The typical ecological footprint for a person in the United States is 8 global hectares (gha) .How would you estimate the number of Earths required to support the entire population of the United States?

• A)Multiply the typical U.S.ecological footprint by the number of people who live there,and divide by the total global hectares of biologically productive land.
• B)Multiply the typical U.S.ecological footprint by the effective population size of the United States,and divide by the total global hectares of biologically productive land.
• C)Take the difference between the typical U.S.ecological footprint and the 1.7 gha sustainable ecological footprint,and multiply this difference by the number of people who live in the United States.
• D)Take the difference between the typical U.S.ecological footprint and the 1.7 gha sustainable ecological footprint,and multiply this difference by the total global hectares of productive land.