What is Shale gas?
'''Shale gas''' is [[natural gas]] that comes from [[shale]], a kind of [[sedimentary rock]]. Most [[natural gas]] in the Earth is shale gas, but getting it out of the ground is difficult. The issues with shale gas are rather similar to [[oil sands]]. In fact all types of oil and [[hydrocarbon]] gas in the ground were made during the far ancient past when the climate was much warmer than today.<ref>Hein, Fran. 2013. ''Geology of the Oil Sands'' (PDF). Association of Petroleum Engineers and Geoscientists of Alberta.</ref> == References == {{reflist}} {{-}} {{stub}} [[Category:Sedimentary rocks]] [[Category:Fossil fuels]] [[Category:Hydrocarbons]]