Begging the Claim Fallacy
Validating the very conclusion that should be proved within the claim itself.
Why is this circular?
The argument smuggles its conclusion into its premises, so accepting the premise is already accepting the conclusion without proof.
Filthy and polluting coal should be banned.
The conclusion that coal pollutes enough to warrant banning is already assumed by calling it “filthy and polluting.”
Related
Closely related to Begging the Question.