new Dutch invention can make cars, busses and other vehicles no less than 50 percent more efficient and thus more environmentally friendly.Efficiency is not synonymous with environmentally friendly.
Regardless of what "environmentally friendly" means.
(how exactly do you get friendly or cordial with an abstract idea like "environment"? Is it possible to be unfriendly with the environment. While strolling along the path the environment said, "Oh avg_freeper you never call. Aren't you my friend anymore? sniff sniff")If you define "environmentally friendly" as reducing pollutants then you must lose some efficiency. My car would be much more efficient if I were allowed to rip all the pollution control doohickeys out of it.