Leonardo DiCaprio, whose role in 1997’s Titanic rocketed him to stardom, lent some serious star power to an oceans-policy conference at the U.S. State Department this week. He pledged grants of $7 million over two years from his private foundation to ocean-conservation efforts. DiCaprio said, “We’re plundering the ocean and its vital resources, and just because we can’t see the devastation from dry land, doesn’t mean it’s any less dangerous.” “It needs to stop.”