natural gas that is found trapped within shale formations
48 structural basins with shale gas and oil, in 39 countries, per the U.S. Energy Information Administration, 2011
As of 2013, the US, Canada, and China are the only countries producing shale gas in commercial quantities. The US and Canada are the only countries where shale gas is a significant part of the gas supply.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).