Re: What are the effects of on going exposure to methane gas?

Pamela,

Methane is the major component of natural gas and has been used 
extensivley in homes for cooking and heating for centuries.  The gas 
itsely is not toxic however it may become dangerous as an explosive.  If 
the gas is contained in some way, and reaches 5% of the total volume, it 
is considered explosive.  Other gases such as hydrogen sulfide are often 
found associated with methane.  This gas is toxic and may pose a health 
hazard, thus you may want to test for it.  I am not aware of any specific 
studies regaurding the health effects of methane, most of the studies I 
have read a great deal with ecological problems of methane as a greenhouse gas 
which may be the cause of global warming.