Trains are nearly always the winning option over moderate-to-long distances; If travelling internationally, going by train or boat is lower-carbon than flying; Electric vehicles are nearly always lower-carbon than petrol or diesel cars.
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Taking the train or ferry works out to be around seven times less polluting than travelling by plane, according to various estimates. Travelling by train is slightly greener than taking the ferry, in terms of emissions.
Trains. Besides walking and biking, traveling by train remains one of the greenest and most environment-friendly options when getting around. Regardless if electric or diesel-powered, trains emit between 66 and 75 percent fewer carbon emissions when compared to cars and airplanes.
The cleanest modes of transportation are walking and biking. Walking to and from the store will not only get you closer to your daily step goal, it will not contribute to air pollution. If you biked one kilometer to the store, your bike's emissions score would be 8.