SCIENCE - Fuel-efficient cars, planes cheaper with magnesium drawn from ocean

A lightweight metal that reduces fuel use in cars and planes could be extracted from the ocean through a unique process being developed at the Department of Energy's Pacific Northwest National Laboratory. The process could ultimately make fuel-efficient transportation more affordable and expand the American magnesium market ...

http://phys.org/news/2013-09-fuel-efficient-cars-planes-cheaper-magnes