This week's rumor of an Al Gore-Laurie David affair heated up like the Earth's surface after a century of fossil fuel-based emissions trapping some serious freaking greenhouse gasses - but like climate change, its validity is hotly debated.
Laurie David's camp has denied it. A source close to Al Gore has denied it.
Still, the rumor of the two environmentalists falling in love - and Gore's marriage falling apart - persists even though it was the famously unreliable Star magazine that linked the Vice President to the producer of An Inconvenient Truth.
Did the publication simply find a file photo of them together and concoct this out of thin air? Did they base it on unfounded rumors? Or is there something to it?
The latest denial comes today from ... Laurie David's contractor.
Calling the report "ludicrous" and "completely ridiculous, Bart Thorpe says "I know for a fact that Laurie hasn't seen Al Gore for at least two years - at least."
There's little evidence of a Laurie David-Al Gore tryst, but rumors persist.
The significance of Bart Thorpe's quote, given to the New York Post, is that he, of all people, supposedly had an affair with Laurie David himself, circa 2007.
Around that time, when he was doing work on her Martha's Vineyard home, she split with Larry David, Seinfeld co-creator and Curb Your Enthusiasm star.
Mrs. David never emphatically denied that rumor, either.
For what it's worth, the National Enquirer says Gore's wife was suspicious of her husband and a certain cadre of ladies - but none match David's description.
Also, an unnamed insider told the tab, "there's never been proof that Al had affairs" or that infidelity contributed to his surprising split with Tipper Gore.
Basically, it looks like this rumor is just a lot of hot air (cue another bad global warming joke), but tabloids have been right about far more absurd things.
The name Rielle Hunter ring a bell?