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Biggest Clean-Tech M&A Deals of 2009

Andrew Holt | Photographer's Choice RF | Getty Images

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Acquiring Company: Bord Gais (Ireland)
Target Company: SWS Natural Resources (Ireland)
M&A Type: Acquisition
Amount: $720 million

Irish energy provider Bord Gáis completed the purchase of SWS Natural Resources, one of the largest wind generators in Ireland, in December 2009.

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Andrew Holt | Photographer's Choice RF | Getty Images