Apple may be targeted by Greenpeace for using dirty coal to power its iCloud, but the company promises that it will soon be operating a new data center in Prineville, Oregon which will be running on 100 percent renewable energy.
Apparently, construction on a 10,000 sq. ft. "modular" facility has begun already, but the company is planning to add much bigger buildings on the 160-acre parcel in the near future. While not confirmed, the renewable energy source for the data center appears to be solar power. Apple is already building a somewhat-green data center in Maiden, North Carolina which will get about 60 percent of its power from a huge solar panel array.
Greenpeace recently claimed that Apple powers its Maiden plant with electricity drawn from coal-powered power plants. Apple, however, stated that Greenpeace got its facts wrong. Greenpeace estimates that Apple's data center power usage at 100 Mwatts, while Apple claims it is only consuming 20 Mwatts. 7 Mwatts come from solar panels and 5 Mwatts from biogas-powered fuel cells, leaving 8 Mwatts to coal power.