A fight over whether or not the Obama ticket supports clean coal is at the heart of these duelling ads, which are clearly targeted at Pennsylvania voters. The Obama campaign released a TV ad, "Figured," claiming that he has fought for support of clean coal. The McCain radio ad, "Clean Coal," uses a comment made by Joe Biden to a voter at a rally seeming to say that the Democratic ticket opposes the creation of new coal mining plants.

Obama TV ad "Figured:"

McCain radio ad "Clean Coal:"