Device and method for managing cardon dioxide emissions for products

A system comprising:

• a production line configured to manufacture at least a first product and a second product;
• an electric power meter configured to measure an electric power consumption amount used on the production line over a predetermined period;
• a management device that is configured to manage a CO2 emission amount emitted by production of the first product and the second product on the production line, the management device comprising:
• a storage device that is configured to store a unit weight of the first product and a unit weight of the second product produced on the production line;
• and
• a control device that is configured to proportionally divide the electric power consumption amount consumed on the production line over the predetermined period, based on a weight ratio of a total weight of the first product and a total weight of the second product produced on the production line over the predetermined period, and calculate the CO2 emission amount for each product,
• wherein:
• the management device is configured to function as a node in a distributed ledger network with nodes of other management devices,
• the management device is configured to transmit the CO2 emission amount for each product to the other management devices, via the distributed ledger network, and
• the other management devices are configured to be notified of the CO2 emission amount for each product by the other management devices approving transaction data.