PISA 2012 Released Items
SAILING SHIPS
Ninety-five percent of world trade is moved by
sea, by roughly 50 000 tankers, bulk carriers
and container ships. Most of these ships use
diesel fuel.
Engineers are planning to develop wind power
support for ships. Their proposal is to attach
kite sails to ships and use the wind’s power to
help reduce diesel consumption and the fuel’s
impact on the environment.