air

Those who go down to the sea in ships – or go to see them in port – may soon be not be able to breathe easier as they thought they would or at least in Jacksonville. Scientists have made the first measurements of ship emissions involving particles less than a millionth of a meter in size. They say it’s an important step in establishing and monitoring the effectiveness of air-pollution regulations for ships.

Until now, researchers in port cities have had a hard time figuring out what proportion of fine sulfate particles come from ships burning high-sulfur bunker oil, compared to the diesel trucks or trains that serve the cities. These fine particles are less than 1-millionth of a meter across. Once inhaled, these particles stay put, researchers say, constituting a potential public-health hazard.