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DTGK, 8/5/10

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chorleywooda | 11:00 Sat 08th May 2010 | Crosswords
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Last one! 29A, Group of autotrophic organisms producing around 70-80% of the Earth's oxygen. A-G-E.
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Algae
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Whoops! How obvious is that. Thanks, Alan.

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DTGK, 8/5/10

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