He moved on to describe the shale gas in the Karoo. The US EIA had previously reported that this was estimated at 485 TcF, but now the figure had been reviewed to 390 TcF. This was part of a worldwide study looking at many countries with not much concentration on detail from one country to another. PASA had done its own detailed study and believed that the resource was more likely to be 40 TcF in recoverable resource. This might be smaller than the numbers produced by the EIA, but it is still a significant amount of gas.