countless - incapable of being counted, to clear - to remove all things from, humid - moist; wet, tropical - hot and humid, pollution - waste products, to cut down - to make a tree or other plant fall to the ground by cutting it near the bottom, to harvest - to gather, square kilometers - km2, to reach - to touch; to get to, to disappear - don’t exist any longer, square meters - m2, species - a biological kind, to be made (out) of - to consist of, rainforest - a dense, evergreen forest with a high annual rainfall , drugs - medicines, cancer - a disease of uncontrolled cell growth, acre - a measure of land , to make up - to combine together to form a group, system, result, etc. ], a surface - the outer or top part or layer of something, a plant - a living thing that grows in earth, in water, or on other plants, usually has a stem, leaves, roots, and flowers, to provide - to give someone something that they need, lungs - breathing organs in the chest of people and some animals, fresh water - water that does not contain any salt, especially water found in lakes and rivers, furthermore - in addition; more importantly, corn - a tall plant grown in many parts of the world for its yellow seeds, which are eaten as food, made into flour, or fed to animals, to cure - to make someone with an illness healthy again, a field - an area of land, used for growing crops or keeping animals, usually surrounded by a fence, valuable - important, useful, or beneficial; worth a lot of money, destruction - the act of destroying something, or the fact of being destroyed,

Unit 13

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