Business Green: China is building its first large-scale coal-to-gas demonstration plant in Inner Mongolia at a cost of $3.7bn (£2.3bn). Construction on the project commenced last week in Chifeng city, according to state-run media. It is being built by China Datang, the country’s second-biggest power producer. The plant will use heat and pressure to convert coal into synthetic gas, which will be piped through a 381km-long gas transmission line to Beijing. It is being built in three …