Two New Approaches To Wind-Powered Ships
Ships haven’t had sails for generations, but the idea is gaining new supporters as shipping companies work to lower their carbon emissions.
Globalization has spawned a tremendous increase in the number of ships crossing the world’s oceans. Ships the size of small cities haul thousands of containers and tankers as large as aircraft carriers transport millions of gallons of oil from one continent to another. Many of them run on bunker oil — a gelatinous mass of whatever is left over after the refining process is over. The stuff is so thick, it needs to be heated in order to flow and when it is burned, it leaves behind sulfurous clouds of carbon dioxide so thick they can be tracked by satellites.