Carbon footprint , the amount of carbon dioxide emissions (CO ₂ ) associated with all activities of a person or other entity (e.g. building, company, country, etc.). It includes direct emissions, such as those arising from the burning of fossil fuels in production, heating and transport, as well as emissions necessary for the production of electricity associated with consumed goods and services. In addition, the concept of carbon footprint often includes emissions of other greenhouse gases, such as methane, nitrous oxide or chlorofluorocarbons (CFCs).Noelle Eckley Selin, britannica.com)