SAN FRANCISCO — Apple CEO Tim Cook says the technology giant has formed a partnership with First Solar to build an $850 million solar farm in Monterey County to power its headquarters and all Apple offices and stores in California.

Cook made the remarks Tuesday at the Goldman Sachs Technology and Internet Conference in San Francisco.

The technology giant is coming off a record-breaking fourth quarter fueled by stunning demand for the first larger-display iPhones.

And Apple, already the world's most valuable company, is headed to becoming a $700 billion company. If Apple closes above $120.18, it will be worth $700 billion.

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