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  • Monitoring, models and strategies are designed for current objectives, which are less rigorous than World Health Organisation guidelines and inadequate to safeguard health.
  • Monitoring and managing individual pollutants does not reflect the atmospheric cocktail.  NO2, for example, frequently occurs with fine particles and is a precursor to ozone.   Temperature has an impact but is not currently taken into account (Doherty, 2009).
  • Analysis of pollutants’ impacts, concentrations and critical loads is complex and methods and consequently results vary.
  • Equipment is calibrated biannually but NO2 diffusion tubes and PM10 data have large uncertainties (LBH, Oct 2002).
  • Models forecasting concentrations and assessing abatement strategies are based on assumptions and datasets that change (Oxley et al, 2003, LBH, October 2002).
  • Local management cannot control transboundary pollution.  Easterly winds, for example, bring transport pollution from the low countries.

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