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Atmospheric pollution has many different detrimental impacts on air quality at urban, regional and global scales. Large volume photoreactors (often referred to as smog or simulation chambers) have been used very effectively to investigate and understand many varied aspects of atmospheric chemistry related to air pollution problems. Photochemical smog formation, which was first observed around 1945 in Los Angeles, is now a major environmental problem for all industrialised and densely populated regions of the world. Over the years many different modelling and experimental tools have been developed to analyse and simulate the complex chemical processes associated with tropspheric photooxidant formation. Work in environmental chambers has played a key role in the development of our understanding of the atmospheric chemistry associated with pollution problems on local, regional and global scales. Chamber observations have also been used in connection with environmental policy issues. In general they are used for validation of atmospheric chemical models, studies of chemical reaction mechanisms and as a direct means to test the possible impact of specific chemical compounds on air quality under simulated ambient conditions New large smog chamber installations have been recently developed in the US (Riverside, California), Europe (Jülich, Germany) and Japan, and a large number of smaller scale laboratory chambers are in operation around the world. Over the years there have been numerous new technical developments related to environmental chamber facilities such as the design of the chambers (e. g.

Nature protection --- Air pollution. Air purification --- luchtverontreiniging

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Emission of pollutants and their accumulation due to poor ventilation and air exchange are serious problems currently under investigation by many researchers. Of particular concern are issues involving air quality within buildings. Toxic fumes and airborne diseases are known to produce undesirable odors, eye and nose irritations, sickness, and occasionally death. Other products such as tobacco smoke and carbon monoxide can also have serious health effects on people exposed to a poorly ventilated environment; studies indicate that indirect or passive smoking can also lead to lung cancer.Design

Indoor air pollution --- Air --- Sick building syndrome --- Mathematical models. --- Pollution --- Pollution, Indoor --- Air pollution. Air purification

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Air pollution. Air purification --- Meteorology. Climatology --- European Union

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614.71 --- Air --- -Atmosphere --- Hygiene of the air. Air pollution --- Pollution --- -Economic aspects --- -614.71 --- -Hygiene of the air. Air pollution --- 614.71 Hygiene of the air. Air pollution --- -614.71 Hygiene of the air. Air pollution --- -Air --- Economic aspects

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A good IAQ investigator is calm, observant, thorough, and discerning. They should be skilled in knowing what questions to ask, have knowledge of building systems, and possess a willingness to engage the public promptly and communicate results clearly to all involved parties. This guide discusses the initial investigation, a HVAC overview and inspection, considerations for special indoor environments, risk communication, and report preparation. Eleven appendices are also included, providing the reader with guidelines, checklists, and forms to assist in their investigations.

Indoor air pollution. --- Air --- Sick building syndrome --- Pollution, Indoor --- Pollution