although I love sailboats (compared to motor boats), they still pollute indirectly (most cruise boats have engines, they need maintenance which pollute, ..) Bi

although I love sailboats (compared to motor boats), they still pollute indirectly (most cruise boats have engines, they need maintenance which pollute, ..) Bicycles too need maintenance, but it's so ridiculously insignificant compared to cars (at least my bike) that we can round to 0!