During the Ice age 700 million years ago, ice covered the entire globe. It reflected by so much of the sun's heat that it seemed that the world would never heat up again. Fortunately, volcanoes came to the rescue, insulating the earth in CO2.
During the Ice age 700 million years ago, ice covered the entire globe. It reflected by so much of the sun's heat that it seemed that the world would never heat up again. Fortunately, volcanoes came to the rescue, insulating the earth in CO2.
General Note
Originally released by BBC Worldwide Learning, 2010.
Streaming video file encoded with permission for digital streaming by Infobase on April 18, 2015.