Agence France-Presse: The ocean is rising. Salt water has eaten up the shoreline and invaded the gardens. For many, it’s time to pack up and go … but without help from the government, hundreds are stuck on this sinking atoll. Paul Tsube is one of the few who managed to leave early. He didn’t wait for government assistance to migrate. He now lives in Buka, in North Bougainville, where he feels he finally has a future. But leaving his past behind wasn’t easy. “it’s a saddening thing to do, he says …