bio-diesel
The least expensive mode of transportation is by water. It is fuel efficient, less polluting and the safest. It is also the least expensive to move cargo.
tatti
Natural gas releases less carbon dioxide pollution when burnt than either coal or oil.
diesel
gasoline
Jet fuel is capable of polluting, just as gasoline is.
It's a car that only runs on electricity so you are not polluting the environment with the gas exaust
By using cycles instead of polluting vehicles.checking the condition of your vehicles
hydrogenA2:Coal is the fuel that produces the least pollution among the choices. Hydrogen would be the least polluting except for the reality that hydrogen is produced by burning coal to produce electricity to electrolyse water. Only if the electricity used to produce the hydrogen were produced by hydro, wind or solar, would hydrogen be less polluting than coal.
Yes people are polluting their water with oil or fuel
Earlier carburated vehicles used external fuel pumps.
New York has the least vehicles per capita.