Brad Pitt saves the saline solution that comes with disposable contact lenses and returns it to the ocean. It's the star's way of countering the lowering of sea levels associated with global warming.
He's also been known to good-naturedly bully fellow actors into donating their own saline solution - and even tears - to the project. Pitt insists that a distinctive plastic water butt is placed outside his trailer on set, so that cast and crew can donate their brine.
Meanwhile Pitt's Ocean's Whatever screenmate George Clooney is telling everyone who'll listen that Brad's barking up the wrong tree. According to Clooney, sea levels will rise as climate change melts the polar ice caps.
Clooney has told close associates that Pitt has miscalculated the effects of evaporation and failed to appreciate the totality of the water cycle.
Brad Pitt was not available for comment.