The SUV also requires more materials,
hence less materials with the same design approach will indeed result in a lighter vehicle.
Not exact matches
Less than 1 percent of their mass is carbon, and even this
material is largely oxidized and
hence an insignificant source of methane.
In the end, using drywalls and sheep wool results in much
less volume of
material than most other
materials, and
hence in
less transportation and packaging.
The most interesting is that contraction is really happening w.r.t. a preferred celestial direction, which exactly cancels out the shift in vacuum, where the speed really is c; and also in solids, since the light always has to pass through the same amount of
material regardless of whether it is contracted or not (
hence takes the same transit time)-- but not in gases where the
material mass is
less in a contracted arm (because gases can move).