About the Author

Natalie Goldstein is a freelance writer who has penned numerous books for the educational market, including Globalization and Free Trade for Facts On File and Checkmark Books, as well as textbooks and teachers' guides for middle schools and encyclopedias for high schools. Kerry Harrison Cook is professor of climate system science in the Department of Geological Sciences, part of the Jackson School of Geosciences at the University of Texas at Austin She has published widely in the field of climate dynamics and was named a Merrill Outstanding Educator in 2003 and 2007.