A green zone exists in which traveling of a vehicle using an amount of electric power that has a greenhouse gas emission intensity greater than a regulatory limit is restricted. A server includes. I/O ports through which the emission intensity of the electric power supplied from an electric vehicle supply equipment is obtained; and a processor that associates the amount of electric power charged from the electric vehicle supply equipment to a battery with the emission intensity obtained through the I/O ports. The processor: determines, based on an amount of electric power having an emission intensity less than the regulatory limit within the amount of electric power stored in the battery, whether a vehicle should be permitted to travel in the green zone; and notifies a user of the vehicle of a determination result.