What does this phrase mean: "how many earths would be required to support a planet in which everyone lived as you do? " what was your footprint (how many earths)? how did it compare to the national and global averages? in what categories were you higher or lower than this average? why do you think your overall impact is higher than/lower than/equal to the average? what factors in your life, background, or current situation account for your overall footprint? if you found this exercise to be problematic, too, let us know.