What Happens to Renault-Nissan after Ghosn is Gone?

He flies over 300,000 miles per year and works 15 to 16 hours a day, just to manage an alliance between the Japanese and French that's responsible for an expected $140 billion in sales this year alone.

The Chairman and CEO of the Renault-Nissan Alliance, Ghosn has managed a number of remarkable feats during his time at both automakers, but there are some that are questioning how much longer the 60-year-old exec can handle the punishing nature of his responsibilities. According to Fortune, six months ago Ghosn signed a four-year contract to continue running Renault, while his tenure at Nissan will continue until at least 2017. Beyond that, though, the future is rather murky, and it's made worse by the high-level turnover that Renault-Nissan has experienced over the past few years, losing execs like Carlos Tavares, Johan de Nysschen and Andy Palmer.

Fortune has an excellent, and lengthy, feature on Ghosn, his responsibilities and the danger posed to Renault-Nissan by his departure.