Green House Effect Dinosaur Extinction case Study

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The Greenhouse Effect

Another popular theory the greenhouse effect theory first proposed by Dewey McLean.  He and many others believed that a intense period of volcanic eruption and small asteroid impact was the cause however Mclean believed this was a minor event and what followed was the result of the extinction of the dinosaurs.

        Mclean says that the asteroid that formed the Chicxulub crater happed 300,000 years before the death of the dinosaurs. According to Mclean the fateful dinosaur killer happed somewhere else on earth and is still yet to be discovered.

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Food Chain Destroyed

Dewey McLean agrees with Walter Alvarez’s theory that the asteroids debris and fires would have blocked out the suns rays resulting in what was later know as the ’Impact Winter’ The earth would have been dark and cold. The cold winter climate would have been to unnatural for the plants (producer) to grow, plants were extremely important, Plants actually changed the chemical makeup of the Earth's atmosphere by giving off oxygen and absorbing carbon dioxide. They also contributed to erosion and the creation of soil. Also, since plants are stationary, they determine where plant-eating ...

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