• [2013-06-10] Shale oil and shale gas resources are globally abundant
  + http://www.eia.gov/pressroom/releases/press391.cfm + http://www.eia.gov/analysis/studies/worldshalegas/
  in Tietoukka Monitor > 2013 > 2013-24 with shale_gas shale_oil

shale_gas from all users