With hopes of influencing other companies, I think they are a little late to the party with Google becoming carbon-neutral in 2007 and Dell a year later but well done, though! ;-)
Making Carbon Neutrality Everyone’s Responsibility at Microsoft - The Official Microsoft Blog – News and Perspectives from Microsoft - Site Home - TechNet Blogs
News and Perspective covering the top stories, events and activities from Microsoft. The content for this blog includes the official information and stories from all of Microsoft's primary businesses....
no plus ones