Companies in China's Ningxia produce biomass fuel as heating season comes

A worker checks the processed material at a biomass fuel producing company in Qingtongxia, northwest China's Ningxia Hui Autonomous Region, Nov. 27, 2018. As the heating season comes, biomass fuel producing companies in Qingtongxia Township collect straw and waste wood to produce biomass fuel for the neighboring heating companies. (Xinhua/Yang Zhisen)