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Recent discoveries of shale gas in Canada have caused a sharp increase in estimated recoverable natural gas in Canada.〔Carrie Tait, ("Canada's natural gas resource jumps dramatically in estimates" ), ''Montreal Gazette'', 13 May 2010.〕 There are a number of prospective shale gas deposits in various stages of exploration and exploitation across the country, from British Columbia to Nova Scotia.〔Kevin Heffernen, (''Shale gas in North America, emerging shale opportunities'' ), PDF file, retrieved 15 April 2009.〕 The US Energy Information Administration estimated in 2013 that there were 573 trillion cubic feet (tcf) of technically recoverable natural gas in Canada.〔US Energy Information Administration, (World shale gas ), 17 May 2013.〕 ==Southern Ontario== There are three major zones identified in Ontario: * the Kettle Point Formation, known in Michigan as the Antrim Shale, where it is a source of shale gas. * the Collingwood/Blue Mountain formations, known as Utica Shale * the northernmost limit of the Marcellus Shale that extends up from Pennsylvania and New York State. While Ontario in 2010 had 1,200 active oil wells and 1,400 active onshore and offshore natural gas wells,〔 there was no major shale gas production as of early 2011. In 2012, a campaign against fracking was launched in Ontario.〔(Stop Fracking Ontario )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Shale gas in Canada」の詳細全文を読む スポンサード リンク
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