Students discover that topsoil is a nonrenewable resource and use an apple to represent how Earth’s land resources are used. Through critical thinking, students study agricultural land use and consider the sustainability of current land use practices including the use of land to feed and graze livestock animals. Grades 9-12

Students evaluate the growth of human populations across time, analyze graphic data to make predictions about future population growth, research country statistics to evaluate demographic transition, and participate in a simulation of a village reliant on subsistence farming. Students begin to develop a sense for the Earth's carrying capacity and how humans have impacted it. Grades 9-12

Students observe soil ecosystems to investigate how human impact affects the biodiversity of soils using the Simpson's Index of Diversity. Then, students conduct an investigation using field corn to determine how the introduction of nitrogen fertilizers impact soil microorganisms and biodiversity. Grades 9-12

Explore concepts of sustainability by evaluating the water footprint (WF) of food. Students are introduced to irrigation practices throughout the world, consumptive and non-consumptive water use, and investigate the water requirements for various food crops. Grades 9-12