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 With Chinese Earth Hour App, Edit the Smog Out of Photos WWF Campaigns from Ogilvy, BBH Tackle China's Horrendous Air Pollution By Angela Doland, Published on March 28, 2014 0 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. Become a Member Already a member? Log in.