Utilization of CO2 in renewable DME fuel production: A life cycle analysis (LCA)-based case study in China

•LCIA comparison between CO2-enhanced and conventional bio-DME production.•The use of CO2 in bio-DME production lowered the environmental impact of DME fuel.•The addition of CO2 in gasifier found to be a novel idea for reducing the LCA impact.•Bio-DME fuel can reduce the impact on human health and the environment.