Definition of terms and explanatory notes. The Official Methods of Analysis was first released in electronic format, as a companion to the print Official Methods of Analysis of AOAC INTERNATIONAL, 18th Edition, in 2005. For new and revised methods approved since 2005, see adoption/revision date for each method. These dates are located in either the header block at the top of the method for major modifications, or in a revision line at the bottom of the method for minor editorial revisions.
They are also known as unconventional because of the novel techniques â like fracking and horizontal drilling â used to extract the gas. Unlike shale gas, coalbed methane extraction doesnât always involve fracking â at least not in the early years of a development.hale gas and coalbed methane are known as 'unconventional' because unlike conventional sources which are found in larger, easier to access reservoirs, the gas is trapped in tiny little pockets in the shale rock or coal seams.
By Joanna Sax. It probably depends on who you ask. Proponents of fracking laud the energy independence, creation of jobs, environmentally friendly nature of natural gas, national security and economic benefits. Opponents to fracking have concerns about the impact to the environment, public health issues, and water use. Each side dismisses the other sideâs arguments. Perhaps a primer on hydraulic fracturing, known as fracking, is helpful. Fracking is the process of creating long vertical wells below the earthâs surface and then horizontal wells that break open the shale and allow the natural gas to be released and captured. Fracking uses millions of gallons of water to create these wells.