BEIJING, China (Reuters) – China has mastered the core technologies for mining natural gas hydrate after it extracted high purity gas in the South China Sea for 22 consecutive days, the longest time in the world, the Ministry of Land and Resources said Friday. Trial mining of natural gas hydrate, commonly known as “combustible ice” as it can be ignited like solid ethanol, in the Shenhu Sea area about 320 kilometers southeast of south China’s Zhuhai […]