One explanation of the Facebook exec departures.

Quoted: Here's one certainty in the hubbub that has resulted in the wake of the departure of high-profile exec Ben Ling from Facebook last week: COO Sheryl Sandberg is definitely not responsible for the melting of the polar ice caps. That's the joking question--Was global warming Sandberg's fault too?--that was asked at a staff meeting at the social networking start-up last Friday afternoon, after the news of Ling's departure, on the heels of some other previous employee exits, suddenly morphed into a series of increasingly vituperative posts on the Valleywag tech gossip site that all centered on what blogger Owen Thomas called Sandberg's "reign of terror" at Facebook. The truth of the situation, though, is actually a lot more interesting.