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@.__
Nonsense !
It is established knowledge that the manufacture of a car takes much more energy than the entire fuel consumption over a cars life time. (a credit to the efficiency of the car design)
This is often expressed, rather graphically, with the (correct) proposition that if you want to buy the most environmentally friendly car then you are best getting a second hand old banger (regardless of its fuel consumption profile) and running it until it dies. This, believe it or not, will cause less environmental impact than the purchase of even the most benign motor vehicle, even a hybrid or electric.
Put simply - an old Jaguar or Ford Escort run for an additional decade will use XXXX fuel (X = it's fuel consumption) - A brand new electric or hybrid run for the same decade would use XX fuel (let's call that half the fuel of the Jag/Ford) in addition to NNNNNNNNNNN (N = fuel used in the manufacturing process).
The car industry, rather conveniently, ignores the manufacturing process when selling.
My point is, fuel consumption is almost irrelevant (really I am not exaggerating here - look into it) in the wider picture as manufacture so heavily outweighs it with regard to fuel use.
Bike = good.