Walmart plans to complete rooftop solar arrays on more than three quarters of its California stores, with projects planned for up to 60 locations.

The planned projects will bring Walmart's total number of solar installations in California to 130. Each array will provide 20 to 30 percent of the store's electric needs, the company says.

When complete, the installations are expected to generate up to 70 million kWh of renewable energy per year, the equivalent of powering more than 5,400 homes and avoid more than 21,700 metric tons of carbon dioxide emissions per year.

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