BBC News - Scientist starts plant-only oxygen test at Eden Project:
'via Blog this'
A scientist is spending 48 hours sealed inside an airtight chamber breathing in oxygen produced solely by plants.
Iain Stewart, a geoscience professor at the Plymouth University, started his experiment at the Eden Project in Cornwall on Thursday.
The challenge is also being filmed for a new BBC Two series, How Plants Made The World.
The aim is to demonstrate the importance of plants to human survival as the "lungs of the planet".
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