Reviewing Renewable Energy Group (NASDAQ:REGI) and Solarwindow Technologies (WNDW) – Fairfield Current

Reviewing Renewable Energy Group (NASDAQ:REGI) and Solarwindow Technologies (WNDW)  Fairfield CurrentSolarwindow Technologies (OTCMKTS:WNDW) and Renewable Energy Group (NASDAQ:REGI) are both small-cap oils/energy companies, but which is the …

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