“Through research and analysis of their consumption of renewable resources, students will measure the amount of land that they would need to support themselves.” Students will use mathematical calculations to estimate liveable space. Features such as acres of arable land, oxygen use, energy use and water use will all be calculated based on human use as a part of the estimated livable space. The three worksheets are set up to examine the needs of an “Average American” which is already given on the worksheets. The materials needed are calculators, the three student worksheets, and utility bills. An estimated time for this activity would be 120 minutes: if the follow-up activities are included, another 60-120 minutes will be needed.