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Methane is a chemical substance CH₄ found in a high percentage in [[natural gas]].  It is also produced through the expulsion of gas from an animal's anus.

Methane is a chemical substance CH₄ found in a high percentage in [[natural gas]].  It is also produced through the expulsion of gas from an animal's anus.

According to the [[United Nations]] Food and Agriculture Organization, some [[scientists]] believe that methane emissions from the increasing numbers of cattle may contribute to [[climate change]].<ref>[http://www.fao.org/newsroom/en/news/2006/1000448/index.html Livestock a major threat to environment: Remedies urgently needed] </ref>.  

According to the [[United Nations]] Food and Agriculture Organization, [[scientists]] believe that methane emissions from the increasing numbers of cattle may contribute to [[climate change]].<ref>[http://www.fao.org/newsroom/en/news/2006/1000448/index.html Livestock a major threat to environment: Remedies urgently needed] </ref>.  

==References==

==References==