Five years ago, Apple, Facebook, and Google were the first companies to commit to powering their businesses 100 percent with renewable energy, according to Greenpeace. Delving into the carbon footprints of those and other leading technology companies, Greenpeace recently released a report titled “Clicking Clean: Who Is Winning the Race to Build A Green Internet?” We bet you can guess a few of the winners.

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Apparently Apple, Facebook, and Google are living up to their commitments; they received top marks alongside newcomer Switch, beating out the competition on factors like renewable energy use and transparency. Apple “played a catalytic role within its IT supply chain, pushing other IT data center and cloud operators who help deliver pieces of Apple’s corner of the Internet to follow their lead in powering their operations with renewable energy,” according to the report.

Related: Apple’s water-resistant iPhone 7 will fight e-waste due to drowned gadgets

Greenpeace gave Apple As in renewable energy commitment, energy transparency, renewable procurement, and energy efficiency and mitigation. The company’s only B was in the advocacy category. Google also received mostly As except for a B in energy transparency, but Apple edges out Google on Greenpeace’s clean energy index to be the top winner.

But not everyone in the tech industry is a winner. According to Greenpeace, Netflix streaming accounts for around one third of North America’s Internet traffic, but they gave the company a D because, according to a statement, Netflix “is likely turning to carbon offsets or unbundled renewable energy credits, which do little to increase renewable energy investment.”

Similarly, Greenpeace called for increased transparency from Amazon Web Services, calling them “a prime example of a company that talks up its renewable projects, but keeps customers in the dark on its energy performance while expanding into markets served by dirty energy like Virginia.”

There’s hope yet for Netflix and Amazon; as recently as 2011 Greenpeace called Apple the “least clean” tech company, but today they lead the way in running a sustainable tech business.

Via Greenpeace and Business Insider

Images via Michele Ursino on Flickr and Mike Deerkoski on Flickr