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Methane FumesSome water heaters use methane as a fuel. Heaters that have not been checked and serviced can release dangerous fumes.

Immediately or shortly after exposure to oxygen levels of less than 15% in air, a person may feel tired, dizzy, and have a headache.

The following health effects can occur after several years of exposure to methane:

Cancer: Methane is not suspected of causing cancer.

Reproductive Effects: The reproductive and developmental effects of methane are not known.

Organ Systems: No long term health effects are currently associated with exposure to methane.

In general, chemicals affect the same organ systems in all people who are exposed. However, the seriousness of the effects may vary from person to person.

A person's reaction depends on several things, including individual health, heredity, previous exposure to chemicals including medicines, and personal habits such as smoking or drinking.

It is also important to consider the length of exposure to the chemical; the amount of chemical exposure; and whether the chemical was inhaled, touched, or eaten.

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Q: How are methane fumes produced from a water heater and why are they dangerous?
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