1. What is the approximate size of the largest per-person footprint? How does this compare to the smallest? (To answer, estimate the two numbers, then divide the larger number by the smaller number.) 2. For the United States, what is the total footprint per person? What proportion of that amount is represented by carbon emissions? Approximately what proportion is represented by croplands? 3. For Denmark, what is the total footprint per person? What proportion of that amount is represented by carbon emissions? Approximately what proportion is represented by croplands?