The European Union has been known to have a sizable amount of shale reserves and over four years they have been able to reach this size by drilling wells for the reserves.
Shale gas is actually gas that are trapped in shale formations and in recent times have becomes a high source of natural gas.
But inspite of the fact that there are huge reserves of them in the European Union, they will actually not come at a cheap price because of the high production costs and it is a long time till adequate amount of it had been reserved to meet the demands.