CO2km

CO2km, also known as carbon dioxide per kilometer, is a metric used to quantify the amount of carbon dioxide emissions generated by transportation. It is calculated by dividing the total CO2 emitted by a vehicle or mode of transport by the distance traveled in kilometers. This metric allows for a standardized comparison of the environmental impact of different travel options, such as cars, trains, airplanes, and buses.

The CO2km value can vary significantly depending on factors such as the type of vehicle, fuel efficiency, passenger load, and the energy source used for electricity-powered transport. For instance, a single-occupant gasoline-powered car typically has a much higher CO2km value than a full train or bus. Airlines generally have the highest CO2km emissions per passenger, while electric trains often have the lowest, especially when powered by renewable energy sources.

Understanding CO2km is crucial for individuals and policymakers aiming to reduce carbon footprints and combat climate change. By tracking and comparing CO2km values, it becomes easier to make informed choices about transportation that minimize environmental impact. This metric aids in the development of sustainable transportation policies, encourages the adoption of more efficient vehicles, and promotes the use of public transport and active travel options like cycling and walking.