The most interesting aspect of the two new data centers is Apple's focus on clean energy and the protection of the environment. The facility in Ireland, for example, will provide an outdoor education space for schools in the area, as well as a walking trail, while the one in Denmark will capture excess heat from the equipment located inside and redirect it into the district's heating system.

The investment in Ireland comes after the Government there decided to phase out the tax arrangement known as the “double Irish” that allowed companies like Apple, Facebook and Google to substantially reduce their tax liabilities.