Antartica and Carbon

This article is about new evidence that suggests that algae helped influence the size and density of the levels of ice sheets. The ice sheets of antartica were built up during times where carbon dioxide was absent in the area. The time each sheet was constructed is relevent to the climate of the world at the time. Global "warming" and "cooling" is influenced by the air among many things of the time. Carbon is a major factor that traps heat so i can be considered a greenhouse gas. A main focus of this story is on the ancient algae and alkenones which are tough organic compounds produced by certain types of algae. They studied that to find the carbon dioxide signature of the period. And with those levels comes the knowledge of what was in the air at the period. This article was found at:http://www.ouramazingplanet.com/2098-antarctic-ice-sheets-grew.html