Search results
Results from the WOW.Com Content Network
Coal tar was one of the first chemical substances proven to cause cancer from occupational exposure, during research in 1775 on the cause of chimney sweeps' carcinoma. [13] Modern studies have shown that working with coal tar pitch, such as during the paving of roads or when working on roofs, increases the risk of cancer.
One can produce a tar-like substance from corn stalks by heating them in a microwave oven. This process is known as pyrolysis. Tar is a dark brown or black viscous liquid of hydrocarbons and free carbon, obtained from a wide variety of organic materials through destructive distillation. Tar can be produced from coal, wood, petroleum, or peat. [1]
Coal ash contains many toxic substances that may affect human health, if people are exposed to them above a certain concentration in the form of particulate matter.So it is necessary to avoid situations in which employees working in coal-fired power plants or public members living close to coal ash landfills will be exposed to high coal ash dust concentrations. [4]
Harmful byproduct of burning coal for power has been used as construction fill for decades, but no one kept track of where it went. EPA: Cancer risk from coal ash higher than previously revealed ...
Coal-tar pitch; Coal-tars (see Coal-tar distillation) Engine exhaust, diesel [5] Estrogen-progestogen menopausal therapy (combined) Estrogen-progestogen oral contraceptives (combined) [note 5] Estrogen therapy, postmenopausal NB There is "evidence suggesting lack of carcinogenicity" for estrogen-only menopausal therapy in humans and colorectal ...
The combustion of coal is the largest contributor to the human-made increase of CO 2 in the atmosphere. [56] Electric generation using coal burning produces approximately twice the greenhouse gasses per kilowatt compared to generation using natural gas. [57] Coal mining releases methane, a potent greenhouse gas.
New tests done by the Environmental Working Group have found 21 oat-based cereals and snack bars popular amongst children to have "troubling levels of glyphosate." The chemical, which is the ...
Dusts that can cause cancer leather or wood dusts, asbestos, [2] crystalline forms of silica, coal tar pitch volatiles, coke oven emissions, diesel exhaust and environmental tobacco smoke. [1] sunlight; radon gas; and industrial, medical, or other exposure to ionizing radiation can all cause cancer in the workplace. Industrial processes ...