At an industrial park in Chifeng, Inner Mongolia, a billionaire is embarking on the next phase of China’s green revolution. Zhang Lei built Envision into one of the largest wind turbine manufacturers in the world. Now the entrepreneur is using wind energy to produce so-called green ammonia, selling it for use in fertilisers and chemicals and as a fuel for shipping. “This is more than a technological milestone,” said Zhang earlier this year. “Scalable, green alternatives are now real and operational.” While clean fuel technologies are still evolving, experts say…