What transporation causes the least pollution?

Question

I mean only one of the kind.

Please make it one that can go across the ocean.

Sorry for the confusion!

Answer 1

Walking.

Answer 2

For ocean crossing, it would be a sail boat as the only energy source being used is the wind. A solar powered catamaran made the ocean crossing last summer from Spain to the East Coast of the USA, but the most common method (for non-polluting sources) would be a sail boat. For the more modern methods of air travel vs. cruise liner, it is a little more difficult to come up with a concrete number. Cruise liners will burn hundreds of thousands of gallons of fuel (which is also of the heavier, dirtier distillate variety) crossing the ocean (based on a personal conversation with a cruise ship crewman and the fact that they can hold upwards of 500,000 gallons for the larger ones), but they are carrying several thousand passengers, whereas a jet will burn far fewer gallons per mile on a long trip (as the greatest amount of fuel used is during take off and landing) and it uses jet fuel which is quite a bit cleaner than bunker fuels, but they carry far fewer passengers. For a long haul, trans-oceanic trip I would say that the per capita per mile emissions would be lower on a jet plane than on a cruise ship.

Answer 3

Sailing. Uses only the wind, gets you there and all you hear are the waves and wind. Other than that an ocean liner or large ocean going ship is a very efficient way to move things and people long distances.

Answer 4

Carpooling!

Answer 5

A bicycle

Answer 6

Your own feet - one of the kind...

Answer 7

peddle bike

Answer 8

swimming

Answer 9

http://www.phoenixmotorcars.com/

Answer 10

A RAFT