The European Commission announced August 14 that an EU rule restricting the amount of sulfur in fuel used by ships at berth led to almost immediate improvements in harbor air quality when it became effective in 2010. According to a study published in the journal Atmospheric Environment by the Commission’s Joint Research Center, air quality measurements carried out before the rule went into effect demonstrated SO2 pollution reductions of two-thirds. The European Parliament and EU Council agreed in May to further restrictions on sulfur marine fuels, implementing International Maritime Organization limits that come into force in 2015 and 2020.