The carbon footprint is used to assess: 1. Methods for sustainable agriculture 2. The total area of biologically productive land 3. Contributions to climate change 4. The volume of green water in production

The carbon footprint is primarily used to assess: **3. Contributions to climate change** The carbon footprint measures the total greenhouse gas emissions (especially carbon dioxide) associated with an individual, organization, event, or product. It helps to understand how various activities contribute to climate change.