These lags could be overcome by devoting more resources to meeting international commitments and by giving greater economic and diplomatic priority to the environment. It also examines performance against the targets in the 2001 OECD Environmental Strategy. Emissions of non-methane volatile organic compounds (NMVOC) should meet the reduction target set by the EU Directive on National Emission Ceilings (NEC) for 2010. S02 concentrations have been kept well below the authorised limit value for the protection of human health. Limit values for fine respirable particles (PM10) have never been exceeded. A national target has been set to have 25% of home-work commuting covered by public transit by the year 2020.