INFORMATION PROCESSING DEVICE AND METHOD

The server obtains a first reduction amount of carbon dioxide emitted from the vehicle group and converts the first reduction amount of carbon dioxide into a first amount of the biological group. The server acquires a second reduction amount of carbon dioxide emitted from the first vehicle by driving of the first user associated with the first vehicle included in the vehicle group, and acquires a contribution degree of the first user in the first amount of the biological group based on the second reduction amount of carbon dioxide. The server causes the predetermined display device to display information indicating the first amount of the biological group and the degree of contribution of the first user.