Swiss emissions of nitrogen oxides (NOx), hydrocarbons and diesel soot have all more than halved since peaking in the 1970s or 1980s, the survey shows, and will fall further still. Lead emissions, which were over 1,500 tonnes per year in 1970, have already virtually ceased. All of the four pollutants except NOx, it says, will have lower emissions in 2020 than in 1950.
Key remaining policy challenges are traffic emissions of carbon dioxide (CO2) and fine particulates, the report says. It concludes that last year's national law requiring an 8% cut in traffic CO2 emissions between 1990 and 2010 (ENDS Daily 8 October 1999) will not be met without further measures. Meanwhile, air concentrations of fine particles (PM10) remain clearly above healthy levels, largely due to traffic pollution, it adds.
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