China expanded its coal-to-gas and coal-to-electricity projects to 35 cities in 2018 from 12 cities the previous year, China’s environment minister, Li Ganjie, said on Monday, as the world’s second-largest economy stepped up its fight against smog. China’s winter heating program used to burn an estimated 400 million tonnes of coal a year, and switching it to cleaner types of fuel was identified as a major part of the country’s war on pollution, now in its sixth year. The program to convert households to low-emission heating ran into difficulties last winter amid widespread natural gas shortages, but 4.8 million households still managed to make the switch from coal to natural gas and electricity last year, up from […]