Page last updated at 11:13 GMT, Monday, 1 June 2009 12:13 UK

Texas takes on green energy

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America is the world's biggest producer of wind energy, with windmills set to contribute to 20% of the US government's renewable power targets.

The BBC's Roger Harrabin has been to Texas where the green technology is being developed as an alternative to coal.

Roger Harrabin reports.

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