Limitations

AIR QUALITY

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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