By WHO Regional Office for Europe
Moment variation The publication offers air caliber instructions for 35 components comprehend to give a contribution to the matter of pollution in Europe. during this moment variation, the publication has been significantly up to date and increased in response to new study findings and advances within the method of hazard overview. instruction values, that have been revised in a chain of professional consultations, are meant to function a foundation for the institution of nationwide criteria and different keep an eye on measures had to shield public healthiness.
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Additional resources for Air Quality Guidelines for Europe 2nd edition (WHO Regional Publications. European Series)
Ecological effects may have a significant indirect influence on human health and wellbeing. For example, most of the major urban air pollutants are known to have adverse effects at low levels on plants, including food crops. A consultation group was therefore convened to consider the ecological effects on terrestrial vegetation of sulfur dioxide, nitrogen dioxide, and ozone and other photochemical oxidants. These substances are important both because of the high anthropogenic amounts produced and because of their wide distribution.
When general ambient air levels are orders of magnitude lower than the guideline values, present exposures are unlikely to cause concern. Guideline values in those cases are directed only to specific release episodes or specific indoor pollution problems. As stated earlier, the starting point for the derivation of guideline values was to define the lowest concentration at which adverse effects are observed. On summary of the guidelines 35 the basis of the body of scientific evidence and judgements of uncertainty factors, numerical guideline values were established to the extent possible.
5–3 × 10–3 Thus current levels of radon in dwellings and other buildings are of public health concern. In addition it should be noted that a lifetime lung cancer risk below about 10–4 could normally not be expected to be achievable because natural concentration of radon in ambient air outdoors is about 10 Bq/m3. Therefore no numerical guideline value for radon is recommended. It is important to note that quantitative risk estimates may give an impression of accuracy that they do not in fact have.