Bikes do not pollute in their normal course of operation. There are pollution issues with their production and their disposal, but a lot less then most forms of transportation.
YES
Yes.
yes it does
not polute the air
They polute it
Humans polute the Ocens, by trash.
by trowing a garbage
they polute water
it will polute the air
they polute the waters of the ocen
because the polluted atoms
Because it just doesn't!