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NL888 Posted 13 years ago
Grammar

CO2 read as C-O-two or carbon dioxide?

Context:

Huge and widespread volcanic eruptions triggered the end-Triassic extinction

Some 200 million years ago, an increase in atmospheric CO2 caused acidification of the oceans and global warming that killed off 76 percent of marine and terrestrial species on Earth.
  

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You will hear - and can use - both versions. Rover

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You will hear - and can use - both versions.

Rover
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