The Earth's inner core is the Earth's innermost part and according to seismological studies, it is primarily a solid ball with a radius of about 1220 kilometers, or 760 miles (about 70% of the Moon 's radius).
AGA Stoves must be installed as they require a flue or a chimney. No extractor fan is needed, as cooking smells from the ovens go straight out that flue. As of 2010, you can purchase AGA Stoves that run on electricity, diesel, natural or propane gas; you can also get dual-fuel versions.
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.