A computerized carbon footprint inventory method of carrying out a carbon footprint inventory of a product is implemented in a computing device. The computing device receives an inventory procedure selected by a user, sets products as inventory targets, loads data as to materials in the product, and determines which materials are to be inventoried according to a weight analysis and according to a carbon dioxide equivalent (CO2e) analysis. The computing device further receives an inventory list uploaded by a vendor, sets a calculation boundary of the carbon footprint inventory and a priority of the material, calculates any uncertainties in relation to the product and the CO2e of the product, generates an inventory report including the uncertainties and the CO2e of the product, and executes an internal verification and an external verification of the inventory report.
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