This activity explores the chemistry and biology underlying forest carbon sequestration, a process that removes carbon from the atmosphere via photosynthesis and storage in plant tissues and soils. Students calculate their entire carbon footprint or just one component that is relevant to their personal lives (transportation, heating/cooling, food, clothing, etc.) and then use the data provided in the “forest flux” sheet to calculate the area of that type of forest that needs to grow in order to offset those carbon emissions for the footprint calculator.