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greenhouse gases pg. 4 - a gas that contributes to the greenhouse effect by absorbing infrared radiation (i.e. carbon dioxide and chlorofluorocarbons)
logging pg. 4 - the activity or business of felling trees and cutting and preparing the timber
tropical forest pg. 4 - an ecosystem type that occurs roughly within the latitudes 28 degrees north or south of the equator which is in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn
urbanization pg. 4 - the process by which rural communities grow to form cities