GigaOM: With Facebook’s 900 million monthly active users spending hours sharing, commenting on and “liking” photos, using apps, and connecting with friends, the social media giant has essentially the world’s biggest platform by which to influence its users. And the future of Facebook’s influence will increasingly be focused on sustainability, if the company’s new(ish) manager of energy efficiency and sustainability, Bill Weihl, has anything to say about it. (Facebook, Web)