"Although currently no U.S. Government-wide definition exists, broadly speaking, if a vital sector of the economy requires a mineral in order to function, that mineral would likely be deemed “critical".
"Shale is a fine-grained sedimentary rock that forms from the compaction of silt and clay-size mineral particles and is easily broken into thin, parallel layers. Black shale contains organic material that can generate oil and natural gas and trap the generated oil and natural gas within its pores.
"Reports of hydraulic fracturing causing felt earthquakes are extremely rare. However, wastewater produced by the hydraulic fracturing process can cause “induced” earthquakes when it is injected into deep wastewater wells.
The aim of this web-based survey is to understand how the decision-making community, geoscience community, and the public define the term "critical issue," as well as which critical issues are of top concern to each community. The survey is deliberately short, broad, and unstructured in order to capture a wide range of responses.