It’s stated in the text that 55 million years ago
01) there was a mass extinction of lots of big fish.
02) there was an irrelevant production of ...
It’s stated in the text that 55 million years ago
01) there was a mass extinction of lots of big fish. 02) there was an irrelevant production of carbon dioxide. 03) the production of CO2 was harmless to the environment. 04) scientists believe that many new forms of shell creatures were created 05) many shell forming organisms suffered a mass extinction.
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