PwC estimates fracking yield
Shale gas deposits in Northern Ireland could be worth about £80bn according to a new report by consulting firm PwC.
It is believed most of the reserves are in the north west and Fermanagh.
The gas would need to be extracted using a controversial process known as hydraulic fracturing, or fracking.
Sinn Féin have claimed the report was "one-sided" and "sensationalist". The issue of fracking has divided the community in Fermanagh in recent years.