Display device, display method and control device

A display method comprising:

• calculating, based on a first route for a vehicle from an origin to a destination and electricity information of electricity stored in an in-vehicle battery in which electricity to be used for travel of the vehicle is stored, a first emission level of carbon dioxide to be caused by travel of the vehicle on the first route;
• calculating, based on a second route for public transportation from the origin to the destination, a second emission level of carbon dioxide to be caused by travel of the public transportation on the second route;
• and
• displaying information based on the first emission level and the second emission level.

A control device comprising:

• an emission level calculator configured to:
• calculate, based on a first route for a vehicle from an origin to a destination and electricity information of electricity stored in an in-vehicle battery in which electricity to be used for travel of the vehicle is stored, a first emission level of carbon dioxide to be caused by travel of the vehicle on the first route;
• and
• calculate, based on a second route for public transportation from the origin to the destination, a second emission level of carbon dioxide to be caused by travel of the public transportation on the second route;
• and
• a controller configured to compare the first emission level and the second emission level.