Mission Geography uses existing NASA data and images where possible to engage students in active, hands-on inquiry, modeling the scientific method and developing students' understanding of environment-society relations and earth science. This module includes three investigations dealing with agricultural systems and related environmental problems and opportunities, including their capacities for sustaining human populations. Students debate the proposition that subsistence agriculture will continue to play a significant role in feeding the populations of the developing world as contrasted with commercial agriculture common in the developed countries in North America and Europe. In the last investigation, students work in groups to investiga...