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If people use the train instead of their cars, it will save energy by a lot. Trains are the most efficient form of transportation, cars the least efficient.



Bicycles are the most efficient form of transportation if we’re talking energy use, but yes, trains beat out cars by a lot. :)


Absolutetly not since the fuel (human food) is horribly CO2 intensive to produce.


You’re still going to eat no matter how you travel though! That’s non-negotiable regardless of mode.

(Also, e-bikes exist too, if you’re really worried that people exercising might eat a little bit more.)


The more fitness you gain, the more effective you are in your energy utilization. Sportive people need less energy! Hard, but true.




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