This article explains how scientists working at the University of York have found that four of the five previous mass extinction events, including the one that killed the dinosaurs, coincided with a phase of increasing greenhouse gases. This led to less global biodiversity, which could be on the horizon for us.
The predicted global temperatures for the next 100 years match levels required by this new evidence to eliminate more than 50% of all life on earth.
There's already been news on some species teetering on the brink of extinction. It looks like the threat of global warming is gaining definition and visibility.
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