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Authored by: JamesK on Tuesday, October 09 2012 @ 11:06 AM EDT |
There was an article in National Geographic last year, about an extremely warm
period about 56 million years ago. The fossil records show that the carbon
dioxide levels shot up dramatically over a short period of time. While they
can't say specifically what caused this, it may have been some major disruption,
such as a huge volcano, that triggered the release of immense quantities of
methane from methane hydrates. So, carbon and especially methane cause
temperatures to rise significantly. Also, the record show the temperature
increase tends to follow the increased use of fossil fuels over the centuries.
That said, there are also many other factors that can significantly affect
temperatures. For example, volcanoes can release large quantities of sulfur,
which cool the earth's temperatures.
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