Apple's has the greenest data centers of all, is the largest supplier of online media for U.S.A.

Apple is rapidly expanding its data center footprint, but not without sophisticated plans to manage its environmental impact. Here's a look at the company's ambitious efforts to build the world's greenest data centers. Data centers are notorious power hogs. Essentially warehouses packed with stacks of servers (pictured above), Apple's facilities support billions of electronic transactions every day, requiring massive processing power. Densely packed racks of servers in vast buildings (pictured below) can consume as much electricity as a small town.

Apple is now hosting 2 billion iMessages per day among its 250 million iCloud users, via both tens of millions of Macs and the installed base of 500 million iOS devices. In 2012, the company's data centers also handled an estimated $8.1 billion in iTunes media transactions (including around $4.4 billion in music sales and $3.7 billion in video content) as well as an additional $7.5 billion worth of App Store sales. Additionally, last month Apple reported coordinating the billionth download of free iTunes U educational content.

The company's data centers also handle massive terabytes of iCloud documents and Photo Stream pictures, iOS device backups, emails, calendars and contact syncs, as well as supporting iPhone location lookups, iBooks, Maps, Siri and software updates for Mac OS, iOS and hundreds of thousands of App Store titles.

A recent study by Strategy Analytics noted that Apple's iCloud is now the largest supplier of online media services for American consumers, equaling the usage of Dropbox and Google combined.

http://appleinsider.com/articles/13/03/25/apples-icloud-reigning-over-the-greenest-data-centers-on-the-planet