It is shaping up to be the biggest Facebook event ever, with 5,000 developers flying in from around the world.

They'll hear exciting news about the company's plans to advance on many fronts, from artificial intelligence to virtual reality.

Apple said Monday it had achieved a goal of "100 percent clean energy" for its facilities around the world.

The California tech giant said its retail stores, offices, data centers and co-located facilities in 43 countries were operating with nonpolluting or renewable energy.

Nine additional manufacturing partners have committed to power all of their Apple production with clean energy, bringing the total number of supplier commitments to 23.

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