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NASA Taking Earth's Temperature Video

The Earth is a complex system with a unique climate. Many scientists are concerned that Earth's climate is changing at an unprecedented rate. 2005 and 2006 were among the hottest years on record; how will 2007 rank? In January, scientists at NASA Goddard Institute for Space Studies will release temperature data for 2007. How do scientists study how warm our home planet is, and how do they determine what factors affect its climate? This short video explores the tools NASA scientists use to take Earth's temperature.