Břidlicový plyn Geology.com geology.com – Horizontal Drilling and Hydraulic Fracturing Shale gas – The U.S. Has Abundant Shale Gas Resources – Horizontal Drilling – Enough for 110 Years of Use – What Is Shale Gas and Why Is It Important? Shale gas Shale gas – What is a Shale “Play”? – Shale Gas vs. Conventional Gas https://geology.com/energy/shale-gas/ shale plays shale gas – Environmental Concerns http://geology.com/energy/shale-gas/ – Natural Gas: A Clean-Burning Fuel