About 75 percent of Apple facilities energy consumption comes from renewable resources, according to a company-issued sustainability report.

In the last two years Apple has increased its use of renewable energy by 50 percent, though the firm’s long-term goal is to run its facilities using 100 percent renewable resources.

Environmental advocates have praised the iPhone maker for its advancements towards green energies.

“Apple’s announcement shows that it has made real progress in its commitment to lead the way to a clean energy future,” said Greenpeace international senior IT analyst Gary Cook.

“Apple’s increased level of disclosure about its energy sources helps customers know that their iCloud will be powered by clean energy sources, not coal.”

Apple has reported that it has implemented a 100 percent renewable energy policy at its datacentres. The company currently has datacentres stationed in North Carolina, Oregon, Nevada, and California.

In April of last year, Greenpeace lambasted Apple for running its cloud storage datacentres in areas which rely heavily on coal power.

Greenpeace says that in order for Apple to reach its goal of 100 percent renewable energy use it will need to work with power providers such as North Carolina’s Duke Energy to change the current dirty energy paradigm.

“As it keeps growing the cloud, Apple still has major roadblocks to meeting its 100 percent clean energy commitment in North Carolina, where renewable energy policies are under siege and electric utility Duke Energy is intent on blocking wind and solar energy from entering the grid,” continued Cook.

“To show how it can help remove those roadblocks, Apple should disclose more details about how it will push utilities and state governments to help it achieve its ambitious goal in all of its data center locations.”

Apple’s use of renewable energy comes following a pledge the firm made last year to increase its use of eco-friendly power. Last May, the firm started pushing to use more on-site power options at its corporate facilities.