SINGAPORE: Thousands of metres below its vast coal basins, China is tapping an unconventional fuel source in a multi-billion-dollar effort to unleash new supplies of natural gas and further Beijing's goal for energy independence.
State energy giant PetroChina's experts forecast the company could produce 30 billion cubic metres (1.06 trillion cubic feet) of coal rock gas by 2035, topping last year's record shale gas output, which made up 10% of the country's production.
