UPDATED: Coal-sponsored CNN rejects accepts anti-coal ad.

UPDATE: ThinkProgress has learned that although CNN initially rejected the ad, it has agreed to run it, beginning on Monday.

On Thursday, the Reality Coalition launched an ad “to demolish the notion that there’s anything clean about so-called clean coal.” Academy Award-winning filmmakers Joel and Ethan Coen created the anti-coal ad to harpoon the coal industry’s greenwashing campaign. Today, Politico’s Mike Allen reported that CNN rejected the ad, which includes the line, “The most trusted name in coal.” Watch it:

As ThinkProgress has reported, CNN’s presidential campaign coverage received significant backing from the coal industry. The Wonk Room’s Brad Johnson has also tracked CNN’s Ali Velshi’s promotion of so-called clean coal.