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Our planet's mass extinctions

Geological Survey of Canada shows that the first mass extinction on earth was due to global warming caused by widespread volcanic eruptions over 455 million years ago. While glaciation often waxes and wanes over millions of years, abrupt mass extinctions have been caused by global warming. Only warming so easily robs the oceans of oxygen, they say, asphyxiating the species that live there. Read more ...

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Basil Crozier - Chair

Chair@rcs-ottawa.ca 

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