From the introduction:
The inaugural Social Media Sustainability Index trawled through 287 major companies in North America and Europe and found 120 that were using social media for sustainability comms. Yet, when we dug deeper, just 60 of those were devoting any dedicated resources to that mission.
Fast-forward to the end of 2011 and a new landscape of social media sustainability has emerged. Today, at least 250 major corporates are engaged in some form of social media sustainability comms and more than 100 have a blog, YouTube, Facebook or Twitter channel dedicated to talking about sustainability.