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Soot in very low concentrations is capable of darkening surfaces or making particle agglomerates, such as those from ventilation systems, appear black. Soot is the primary cause of "ghosting", the discoloration of walls and ceilings or walls and flooring where they meet.
Smoke or soot was the first pollutant to be recognized as having significant environmental impact yet one of the last to be studied by the contemporary atmospheric research community. Soot is composed of a complex mixture of organic compounds which are weakly absorbing in the visible spectral region and a highly absorbing black component which ...
Many gases have toxic properties, which are often assessed using the LC 50 (median lethal concentration) measure. In the United States, many of these gases have been assigned an NFPA 704 health rating of 4 (may be fatal) or 3 (may cause serious or permanent injury), and/or exposure limits (TLV, TWA/PEL, STEL, or REL) determined by the ACGIH professional association.
Soot; Volatile organic compound; Biological. ... At concentrations above 1000ppm it is considered immediately dangerous and is the most immediate health hazard from ...
A car's diesel soot caused a large Southern California wildfire that forced the evacuation of thousands and is threatening hundreds of homes, authorities said Monday. In an interview, a spokesman ...
Why is wildfire smoke dangerous? Wildfire smoke is a mixture of gases and fine particulate matter created from burning vegetation and structures, according to the Centers for Disease Control and ...
The EPA says wildfire smoke has short- and long-term health consequences. Doctors to explain the health risks of wildfire smoke and dangerous air quality.
Chimney sweeping (see Soot) Coal gasification; Coal, indoor emissions from household combustion of; Coal-tar distillation; Coke production; Firefighter (occupational exposure as a) Furniture and cabinet making (see Wood dust) Haematite mining (underground) Iron and steel founding (occupational exposure during) Isopropyl alcohol manufacture ...