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Nature 447, 521 (31 May 2007) | doi:10.1038/447521b; Published online 30 May 2007
Market watch
Quirin Schiermeier
As the European Commission implements more stringent national caps on carbon dioxide emissions this spring, demand is rising on the emissions markets for the allowances that let companies emit more CO2.Several million allowances are traded daily at five European carbon exchanges, including the European Energy Exchange (EEX) in Leipzig, Germany (above).
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