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The idea for the Eden Project was conceived in 1994 and building work started in 1998

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Eden expected 750,000 visitors in the first year, but got nearly twice that figure

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The biomes are made up of hexagons that are approximately 9m across

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Climatic control uses computerised systems for automatic ventilation and heating

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The whole structure is guaranteed maintenance free for at least 25 years

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The biomes are host to more than 100,000 plants representing 5,000 species from around the world