Methane is an important part of natural gas which is a colorless and odorless gas. Person can be exposed to methane gas by inhalation. Methane gas can be inhaled when it enters our homes or office building. The other possible way of exposure to methane gas is through ingestion.

It is possible to identify signs of methane gas exposure, by understanding the various methane gas exposure symptoms. Here are some methane gas exposure symptoms:

Exposure to high levels of methane gas depletes the oxygen level in the body, causing difficulty in breathing and suffocation.

If the oxygen level in the body depletes to anything less than 12%, it can cause unconsciousness and also prove to be lethal in some cases.

Since the levels of oxygen in the body depletes, the body tries to make it up by using the oxygen contained in the bodily fluids. This basically leads to dehydration.

Nausea and vomiting are also methane gas poisoning symptoms. There are chances that a person can collapse.

Headaches are also caused by methane gas exposure. This sign was also observed in the school in Texas, where a methane gas blast killed about 300 students and faculty members.

Another symptom of methane gas exposure is heart palpitations. It causes an uncomfortable sensation of the heart beating rapidly, abnormally and out of sequence.

Due to the depletion of oxygen in the body, methane gas exposure gives rise to cognitive problems. The person is inattentive, has memory loss and also poor judgment. These symptoms aggravate, when the exposure to this gas is more.

Exposure to methane gas also causes dizziness and blurred vision. This symptom reduces, when the person moves away from the area that is high in methane gas concentration.

Methane gas exposure also causes lack of motor coordination. There are chances that the person will drop things he has picked up, more often.

Some patients also display flu like symptoms. The patient may also experience mental uneasiness and lethargy.

To prevent the formation of methane gas at home, it is necessary that your house and office buildings are well ventilated.

Cows are evil. If you're walking along a fenced in cow pasture in the middle of the night those fartknockers will follow you along the fence ripping puffs of methane the whole way.

Cows fart out methane gas??? I never knew that...

Cow farts article: http://www.telegraph.co.uk/news/newstopics/howaboutthat/2274995/Cow-farts-collected-in-plastic-tank-for-global-warming-study.html and this next one would seem to suggest they belch out even more than they fart: http://animals.howstuffworks.com/mammals/methane-cow.htm there's even a bit on the second page of that article detailing how farmers collect the methane and use it to power their farms!

So long horsepower, hello cow power !