The number

20 percent

China may have the world's largest mineable shale gas reserves, about 20 percent of the world's total, according to a report published by the Ministry of Land and Resources. The report said the world's mineable shale gas reserves are estimated to reach 187 trillion cubic meters, with more than 36 trillion cu m in China. China's interest in shale gas exploration is increasing with an estimated output of 6.5 billion cu m by 2015.