The US EPA says that burning coal is a leading cause of global warming pollution. We've long been hearing about "clean coal" - but is there really such a thing?
The folks behind ThisIsReality.org don't think so, and neither do the Coen Brothers, who produced this mock commercial for a clean coal air freshener.
The Coen Brothers, who directed films such as The Big Lebowski and Fargo are also responsible for another clean coal commercial - a tour of a "clean coal facility."
What do you think - is there a such thing as clean coal? Or is it all a bunch of bull?
