Google will obviously do quite well on these two: there are well known projects at the company to build renewable energy systems for external use just as there are similarly well known projects to power the company through renewables.

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The company plans to start production at a facility in Columbus, Mississippi and start selling renewable fuel this fall.

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Ian Draisey, the parent who helped on the project, has two pupils at Ysgol y Traeth and works with Dulas, a renewable energy company based at Machynlleth, Powys.

BBC: School to produce own electricity