Walmart announced that it will double its solar power usage

By Stephen Silver

On Earth Day, Walmart announced that it will double its solar power usage, adding solar panels to the roofs of as many as 20 more stores and service centers.

According to USA Today, each project will provide the amount of energy needed to power 2,600 homes and avoid 22,500 metric tons of carbon-dioxide emissions yearly. BP Solar will provide the panels.

Walmart launched its green campaign in 2005.

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