From Apple’s press release:

Apple® today announced a €1.7 billion plan to build and operate two data centres in Europe, each powered by 100 percent renewable energy. The facilities, located in County Galway, Ireland, and Denmark’s central Jutland, will power Apple’s online services including the iTunes Store®, App Store℠, iMessage®, Maps and Siri® for customers across Europe.

“We are grateful for Apple’s continued success in Europe and proud that our investment supports communities across the continent,” said Tim Cook, Apple’s CEO. “This significant new investment represents Apple’s biggest project in Europe to date. We’re thrilled to be expanding our operations, creating hundreds of local jobs and introducing some of our most advanced green building designs yet.”

And:

Like all Apple data centres, the new facilities will run entirely on clean, renewable energy sources from day one. Apple will also work with local partners to develop additional renewable energy projects from wind or other sources to provide power in the future. These facilities will have the lowest environmental impact yet for an Apple data centre.

And:

In Viborg, Denmark, Apple will eliminate the need for additional generators by locating the data centre adjacent to one of Denmark’s largest electrical substations. The facility is also designed to capture excess heat from equipment inside the facility and conduct it into the district heating system to help warm homes in the neighboring community.

Love that last bit.