CNN
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As the US attempts to wean itself off its heavy reliance on fossil fuels and shift to cleaner energy sources, many experts are eyeing a promising solution: your neighborhood big-box stores and shopping malls.
The rooftops and parking lot space available at retail giants like Walmart, Target and Costco is massive. And these largely empty spaces are being touted as untapped potential for solar power that could help the US reduce its dependency on foreign energy, slash planet-warming…
