Green coal is a term used in the energy industry to describe coal that is produced using environmentally friendly methods. There are several synonyms for this term, including eco-coal, sustainable coal, clean coal, and low-carbon coal. Each of these terms reflects the commitment of the energy sector to reducing greenhouse gas emissions and mitigating the impact of coal mining on the environment. Eco-coal and sustainable coal suggest that coal production should be done in a sustainable way, while clean coal and low-carbon coal imply that coal should be produced with minimum environmental impact, with low carbon emissions. These synonyms show the industry's focus on producing coal while minimizing its environmental impact.