Guardian: Descendants of legendary oil tycoon John D Rockefeller have accused ExxonMobil of adopting a myopic approach towards alternative sources of energy and of refusing to engage in any meaningful discussion about the future of the planet. At a feisty press conference in the penthouse suite of a luxury Manhattan hotel, members of the billionaire Rockefeller family complained that the world’s biggest oil company has repeatedly declined to listen to concerns about the direction of the …