Greenpeace International gave Apple a mixed review over its clean energy plans for its data centers, the huge servers farms that power its iCloud and other online services like iTunes, saying in a report today that the company hasn’t provided enough details about how it’s going to reach its goals. Apple disagrees, saying it’s working to deliver on the promises it made in May to make all of its data centers coal free and run them using renewable energy sources — and that it has been transparent about what it’s up to.

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