You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Why Marketers Are Learning to Embrace Sustainability Through Social Media How Leaders Like GE, PepsiCo, Ford and Allianz Are Making Their Core Business More Sustainable By Matthew Yeomans, Published on January 25, 2012 2 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Register Now Already a member? Log in.