Mass extinction 252 million years ago coincided with an increase in carbon dioxide Facts
Presumably the first living organisms appeared 3.8 billion years ago. Over the past 500 million years on Earth happened five mass extinctions. Scientists agree that dinosaurs may have become extinct 66 million years ago with the fall of a huge asteroid. Greatest mass extinction, during which lost some 90% of marine and terrestrial species, occurred at the end of the Permian period 250 million years ago. But the reason has not yet been established.
Researchers at MIT have come to two conclusions about the mass extinction. First, they believe that the extinction occurred during 20,000 years. Secondly, that it coincided with the increase of carbon dioxide in the atmosphere. The scientists found that the amount of carbon dioxide released into the atmosphere at the end of the Permian period, can be compared with the volume of carbon dioxide emitted by the burning of fuel today. For 10,000 years, the carbon dioxide has caused global warming, accelerating extinction of thousands of species of living organisms. Scientists have also found an increase in fires in the late Permian period, which initiated the severe soil erosion and dry climate.