Getting Warmer? Prehistoric Climate Can Help Forecast Future Changes

This article is about how scientists are testing fossils from the mid Pliocene time period. They have noticed that during this time there was extreme warming throughout the world and global average temps were 2.5 degrees Celcius greater than today. Scientists have also found out that CO2 levels during the mid Pliocene time were only slightly higher than today's levels which shows that just a slight increase in our current CO2 level could have a large impact on the temperature.