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Now for Todays Lesson

CARCINOGENS cause CANCER

What is a CARCINOGEN:-

Carcinogens are substances that cause cancer. Sometimes radiation or radionuclide are also considered carcinogens. A common example of a carcinogen is tobacco smoke.

It has been suggested that Oncogenesis be merged into this article or section. (Discuss)

Cancers are caused by a series of mutations. Each mutation alters the behavior of the cell somewhat.

Carcinogenesis (the creation of cancer), is the process by which normal cells are transformed into cancer cells.

IS FORMALDEHYDE A CARCINOGEN??

If so - do you care - Have you Children, Parents, A life??

• Formaldehyde is a colorless, flammable, strong-smelling chemical that is used in building materials and to produce many household products (see Question 1).
• Formaldehyde sources in the home include pressed-wood products, cigarette smoke, and fuel-burning appliances (see Question 2).
• When exposed to formaldehyde, some individuals may experience various short-term effects (seeQuestion 3).
• Formaldehyde has been classified as a known human carcinogen (cancer-causing substance) by the International Agency for Research on Cancer and as a probable human carcinogen by the U.S. Environmental Protection Agency (see Question 4).
• Research studies of workers exposed to formaldehyde have suggested an association between formaldehyde exposure and several cancers, including nasopharyngeal cancer and leukemia (seeQuestion 5).

ou EVEN care?

Have you kids?

Parents?

A life?

Because we can no longer find enough mature forests that can be milled to meet demands, the building industry is focused on gluing together chopped up pieces of remaining and young forests using urea-formldehyde (U-F) phenol formaldehyde (P-F) and methylene-diisocyanate (MDI).

Workers are now facing far more toxic workplaces in manufacture and building trades, communities are dealing with toxic releases of these chemical into their air, land and water, and consumers are seeing elevated levels of toxins within their homes. While MDI is far more toxic acutely to workers in manufacturing, the more widely used formadehyde based building products out-gas into homes of consumers for years. U-F is an order of magnitude more potent than P-F. According to studies published in the Journal of Occupational and Environmental Medicine [1], OSB (oriented strand board) workers were more likely to have increased incidences of asthma and other airway dysfunction. Other studies show high exposures can produce pulmonary edema and death [4]. The EPA considers formaldehyde to be a probable human carcinogen in nasal passages, larynx, and lungs [2], and animal studies [3] show them to be carcinogenic. Menstrual disorders and pregnancy problems have also been reported in female workers exposed to formadehyde. Cyanide-based MDI is a suspected human carcinogen [5], and isocyanates have also been shown to cause respiratory distress and death in humans and cancers in lab animals. (An MDI release in Bhopal, India killed 2000 people.)

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