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Published online 17 May 2001 | Nature | doi:10.1038/news010517-8
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Climatologists pore over past
Fossil leaves tell us about the air the dinosaurs breathed.
Carbon dioxide has been a greenhouse gas for at least the past 300 million years, according to a new study of pores in the leaves of fossilized plants1.Although CO2 is widely recognized as being involved in warming the globe today, its role as an agent for climate change past -- and potentially therefore, in the future - has recently been contested.
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