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Ohio is the place to be this week. Barack Obama, John McCain and Sarah Palin have all been making the political rounds there the past few days. The Sierra Club, capitalizing on all the attention this battleground state is receiving, released a radio ad there Wednesday that contrasts the candidates' stances on clean energy.

In "American Jobs" (subscription) an announcer chides McCain for failure to support the clean energy industry and for voting "to make it easier for companies to outsource jobs." The announcer then claims that Obama is committed to clean energy and will create "5 million new jobs" in that sector.

Energy has been put on the back-burner the past few weeks due to the financial crisis. Through this spot, though, the Sierra Club aims to link energy directly to the issue that, according to organization spokesman Josh Dorner, is most crucial to residents in this industrial state -- jobs.