Concentrations are expressed as a median of annual mean concentrations. Up to three-year gaps of missing values have been interpolated or extrapolated. Only complete series with no missing values after this interpolation/extrapolation are included. The number of time series/river stations is shown in parentheses. The trend for 1992 to 2010 for each of the ecological quality classes has been linearly extended to 2027 — or when the concentration level becomes negative.
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Get in shape and be friendly to the environment all at once!
Journeys of less than 3 km may take less time if you walk, use a bike or even take the bus. If taking your kids along, try using a skateboard, skipping rope, rollerblades or buggy boards! Remember how much fun it was when you were a kid.
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