Fantastic notion definition1/9/2023 ![]() ![]() WHO periodically issues these health-based AQGs to assist governments and civil society in reducing human exposure to air pollution and its adverse effects. They are also a practical instrument with which to design effective measures to achieve pollutant emission and concentration reductions, and therefore, to protect human health. Guideline levels for specified pollutants can be used as an evidence-informed reference to help decision-makers in setting legally binding standards and goals for air quality management at international, national and local levels. When action is taken to reduce these classical pollutants it also has an impact on other pollutants. The guidelines focus on so-called classical pollutants, particulate matter (PM₂.₅ and PM₁₀), ozone (O₃), nitrogen dioxide (NO₂), sulfur dioxide (SO₂) and carbon monoxide (CO). They cover some of the most monitored pollutants critical for health, for which evidence on health effects from exposure has advanced the most in the past 15 years. ![]() The AQGs also serve as a reference for assessing if, and by how much, the exposure of a population exceeds levels at which it might cause health concerns. They also offer qualitative statements on good practices for the management of certain types of particulate matter (PM), for example, black carbon/elemental carbon, ultrafine particles, and particles originating from sand and dust storms, for which there is insufficient quantitative evidence to derive AQG levels.īased on the extensive scientific evidence currently available, the guidelines identify the levels of air quality necessary to protect public health worldwide. The updated WHO Global Air Quality Guidelines (AQGs) provide recommendations on air quality guideline levels as well as interim targets for six key air pollutants.
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