Clean-burning and Coal-burning

Clean-burning adjective - Leaving little contamination while consuming fuel.

Coal-burning and clean-burning are semantically related. In some cases you can use "Coal-burning" instead an adjective phrase "Clean-burning".

Coal-burning adjective - Fueled by burning coal.

Clean-burning and coal-burning are semantically related. You can use "Clean-burning" instead an adjective phrase "Coal-burning".